Class 12 Physics Ch-5 Magnetism and Matter MCQs Exam 2027

Topic 1: Chumbak ke Samanya Guna evam Prabhavi Lambai (Basic Properties & Effective Length)

1. Chumbak ki prabhavi lambai ($L_e$) aur jyamitiya lambai ($L_g$) ke beech sahi sambandh hai : [BSEB, 2021 (A)]

   (A) $L_e = \frac{5}{6} L_g$

   (B) $L_e = \frac{6}{5} L_g$

   (C) $L_e = L_g$

   (D) $L_e = 2 L_g$

2. Chumbak ki jyamitiya lambai ($L_g$) evam chumbakiya lambai ($L_m$) mein sambandh hota hai : [BSEB, 2020 (A)]

   (A) $L_m = \frac{5}{6} L_g$

   (B) $L_m = \frac{6}{5} L_g$

   (C) $L_m = L_g$

   (D) $L_m = 2 L_g$

3. Chumbak ke do dhruvon ke beech ki doori ko kehte hain : [BSEB, 2023 (A)]

   (A) Chumbakiya lambai

   (B) Chumbakiya kshetra

   (C) Chumbakiya aksh

   (D) Chumbakiya aaghurn

4. Yadi kisi chhad-chumbak ko do bhagon mein vibhakt kar diya jaye, toh kiska maan aparivartit rahega?

   (A) Dhruv-prabalta

   (B) Jadatva aaghurn

   (C) Chumbakiya aaghurn

   (D) Chumbak ki prabhavi lambai

5. Dhruv prabalta $m$ wale chumbak ko lambai ke anudish $n$ barabar bhagon mein kaatne par pratyek bhag ki dhruv prabalta hogi : [BSEB, 2017 (A)]

   (A) $m$

   (B) $m/n$

   (C) $n/m$

   (D) $m \cdot n$

6. Chumbak ko lambai ke lambvat do barabar bhagon mein baantne par chumbak ka chumbakiya aaghurn :

   (A) Aadha ho jata hai

   (B) Dugni hoti hai

   (C) Aparivartit rehti hai

   (D) Inmein se koi nahi

7. $m$ dhruviya prabalta wale chumbak ko chaar bhagon mein is prakar baanta jata hai ki iski lambai aur chaudai pehle chumbak ki aadhi ho jati hai. Tab pratyek bhag ki chumbakiya prabalta hogi :

   (A) $m/4$

   (B) $m/8$

   (C) $m/2$

   (D) $4m$

8. Dhruv prabalta ka S.I. matrak hai : [BSEB, 2010, 2021, 2022]

   (A) N

   (B) N/Am

   (C) Am

   (D) T

9. Yadi do dhruvon ki dhruviya prabalta aur unke beech ki doori dugni kar di jaye tab dhruvon ke beech laga bal :

   (A) Ghatkar aadha ho jata hai

   (B) Aparivartit rehta hai

   (C) Badhkar dugna ho jata hai

   (D) Chaar guna ho jata hai

10. Chumbakiya aaghurn $\vec{M}$ ki disha hoti hai :

    (A) Uttari dhruv se Dakshini dhruv ki ore

    (B) Chumbakiya aksh ke lambvat

    (C) Dakshini dhruv se Uttari dhruv ki ore

    (D) Inmein se koi nahi

Topic 2: Chumbakiya Aaghurn evam Matrak (Magnetic Moment & Units)

11. Chumbakiya aaghurn ka S.I. matrak hota hai : [BSEB, 2018, 2021]

    (A) $JT^{-1}$

    (B) $Am^2$

    (C) Dono (A) aur (B)

    (D) Inmein se koi nahi

12. Chumbakiya aaghurn ki vima hoti hai : [BSEB, 2018 (A)]

    (A) $L^2 A$

    (B) $L A^2$

    (C) $M^0 L^2 T^0 A^1$

    (D) (A) aur (C) dono

13. $M$ chumbakiya aaghurn wale chhad chumbak ko do saman tukde mein toda jata hai toh pratyek naye tukde ka chumbakiya aaghurn hai : [BSEB, 2018 (A)]

    (A) $M$

    (B) $M/2$

    (C) $2M$

    (D) Zero

14. Kisi ($M$) chumbakiya aaghurn wale chumbak ki lambai ke samanantar $n$ barabar tukdon mein kaatne par pratyek tukde ka aaghurn hoga : [BSEB, 2024 (A)]

    (A) $\frac{M}{n}$

    (B) $\frac{M}{n^2}$

    (C) $\frac{M}{2n}$

    (D) $M \times n$

15. Dharavahi kundli ka vidyut-chumbakiya aaghurn hota hai : [BSEB, 2022 (A)]

    (A) $\vec{m} = \frac{N\vec{A}}{I}$

    (B) $\vec{m} = \frac{\vec{A}}{NI}$

    (C) $\vec{m} = NI\vec{A}$

    (D) $\vec{m} = \frac{\vec{I}A}{N}$

16. Kisi chumbak ka chumbakiya aaghurn hai :

    (A) Adish rashi

    (B) Sadish rashi

    (C) Udasin rashi

    (D) Inmein se koi nahi

17. Chumbakiya aaghurn $M$ ka sutra hota hai :

    (A) $m \times 2l$

    (B) $m / 2l$

    (C) $m \times l$

    (D) $m^2 \times l$

18. Chumbakiya aaghurn ki ikai $Am^2$ ke alava aur kya ho sakti hai?

    (A) $J/T$

    (B) $N/T$

    (C) $V/m$

    (D) $Wb/m$

19. Chumbakiya dhruv prabalta ka matrak $Am$ hai, iski vima kya hai?

    (A) $[AL]$

    (B) $[AT]$

    (C) $[ML^2]$

    (D) $[M^0 L^1 T^0 A^1]$

20. Chumbakiya aaghurn ka vimaiya sutra hai :

    (A) $[L^2 A]$

    (B) $[L^1 A]$

    (C) $[L^2 T A]$

    (D) $[M^1 L^2]$

Topic 3: Chumbakiya Kshetra, Prerana evam Flux (Magnetic Field & Flux)

21. Chumbakiya prerana $\vec{B}$ tatha chumbakan ki tivrata $\vec{M}$ ke beech sambandh hai : [BSEB, 2021 (A)]

    (A) $B = \mu_0 (H + M)$

    (B) $B = \mu_0 (H – M)$

    (C) $B = \mu_0 M$

    (D) $B = \mu_0 H$

22. Chumbakiya flux ka S.I. matrak hai : [BSEB, 2021, 2022]

    (A) Weber (Wb)

    (B) Tesla (T)

    (C) Ampere (A)

    (D) Joule (J)

23. Chumbakiya tivrata ($H$) ke barabar hota hai : [BSEB, 2022 (A)]

    (A) $B_0 / \mu_0$

    (B) $\mu_0 / B_0$

    (C) $B_0 \cdot \mu_0$

    (D) $B_0^2 / \mu_0$

24. Chumbakiya prerana ka S.I. matrak hai :

    (A) Weber (Wb)

    (B) Tesla (T)

    (C) Faraday (F)

    (D) Ampere $\times$ Meter (Am)

25. Nimitlikhit mein kaun chumbakiya kshetra ki ikai nahi hai? [BSEB, 2011 (A)]

    (A) Tesla

    (B) Weber/meter$^2$

    (C) Newton/ampere-meter

    (D) Weber/meter

26. $\frac{\text{Chumbakiya flux}}{\text{Vidyutiya flux}}$ ki vima hai :

    (A) $LT^{-1}$

    (B) $L^{-1}T$

    (C) $TL^{-1}$

    (D) $M^0 L^0 T^0$

27. Chumbakiya kshetra ki tivrata ki vima hai : [BSEB, 2018 (A)]

    (A) $M L^0 T^{-2} A^{-1}$

    (B) $M L T^{-2} A^{-1}$

    (C) $M L^0 T^{-2} A$

    (D) $M^0 L^0 T^0 A^0$

28. Chumbakiya flux ghanatva ka matrak hota hai : [BSEB, 2022 (A)]

    (A) Weber

    (B) Tesla

    (C) Henry

    (D) Ampere/meter

29. Chumbakiya prerana ki vima hai : [BSEB, 2024 (A)]

    (A) $MT^{-2} A^{-1}$

    (B) $MLT^{-2} A^{-1}$

    (C) $ML^2 T^{-2} A^{-1}$

    (D) $M^0 L^0 T^0$

30. Chumbakiya flux ($\phi$) ka vimaiya sutra hai :

    (A) $ML^2 T^{-2} A^{-1}$

    (B) $ML T^{-2} A^{-1}$

    (C) $ML^2 T^{-1} A^{-1}$

    (D) $M L^2 T^{-2}$

31. Ek Gauss barabar hota hai :

    (A) $10^{-4}$ Tesla

    (B) $10^4$ Tesla

    (C) $10^{-6}$ Tesla

    (D) $10^{-2}$ Tesla

32. Ek Tesla (1 T) barabar hota hai :

    (A) $1$ Weber/meter$^2$

    (B) $1$ Newton/ampere-meter

    (C) $10^4$ Gauss

    (D) Uparyukt sabhi

33. Chumbakiya kshetra ki tivrata $H$ ka matrak hai :

    (A) Ampere/meter

    (B) Ampere-meter

    (C) Tesla

    (D) Weber

34. Kisi band tal se guzarne wala kul chumbakiya flux hota hai :

    (A) Dhanatmak

    (B) Rinatmak

    (C) Shunya

    (D) Anant

35. Dharavahi vrittakar kundli ke kendra par chumbakiya kshetra hota hai : [BSEB, 2022 (A)]

    (A) Kundli ke tal mein

    (B) Kundli ke tal ke lambvat

    (C) $45^\circ$ par

    (D) $180^\circ$ par

Topic 4: Chumbakshilta evam Chumbakiya Pravriti (Permeability & Susceptibility)

36. Chumbakshilta ($\mu$) ke liye nimnalikhit mein kaun sambandh sahi hai? [BSEB, 2021 (A)]

    (A) $\mu = \frac{H}{B}$

    (B) $\mu = \frac{B}{H}$

    (C) $\mu = B \cdot H$

    (D) $\mu = (B + H)$

37. Lauh chumbakiya padarth ke liye apekshik chumbakshilta ($\mu_r$) ka maan hota hai : [BSEB, 2025 (A)]

    (A) $\mu_r < 1$

    (B) $\mu_r = 1$

    (C) $\mu_r > 1$

    (D) $\mu_r >> 1$

38. Chumbakshilta ki vima hai : [BSEB, 2015, 2025]

    (A) $MLT^{-2} I^{-2}$

    (B) $MLT^{-2} I^{-1}$

    (C) $MLT^2 I^2$

    (D) $MLT^{-2}$

39. Nirvat ki chumbakiya pravriti ka maan hota hai : [BSEB, 2021 (A)]

    (A) $0.5$ ke barabar

    (B) Anant

    (C) $1$ ke barabar

    (D) Shunya

40. Sapeksh pargamyata ($\mu_r$) barabar hai : [BSEB, 2026]

    (A) $\mu / \mu_0$

    (B) $\mu_0 / \mu$

    (C) $\mu \cdot \mu_0$

    (D) $\sqrt{\mu \cdot \mu_0}$

41. Anuchumbakiya padarth ki pravriti hai : [BSEB, 2019 (A)]

    (A) Sthir

    (B) Shunya

    (C) Anant

    (D) Chumbakiya kshetra par nirbhar

42. Vayu ki chumbakiya pravriti hoti hai : [BSEB, 2021 (A)]

    (A) Dhanatmak

    (B) Rinatmak

    (C) Shunya

    (D) Anant

43. Pratichumbakiya padarthon ki chumbakiya sugrahita ($\chi$) hoti hai : [BSEB, 2017 (A)]

    (A) Dhanatmak aur bahut adhik

    (B) Dhanatmak aur bahut kam

    (C) Rinatmak

    (D) Shunya

44. Chumbakiya pravriti $\chi$ ka maan rinatmak hota hai :

    (A) Lauh-chumbakiya ke liye

    (B) Anuchumbakiya ke liye

    (C) Pratichumbakiya ke liye

    (D) Sabhi ke liye

45. Anuchumbakiya padarthon ki chumbakshilta ($\mu$) hoti hai :

    (A) $\mu > \mu_0$

    (B) $\mu < \mu_0$

    (C) $\mu = \mu_0$

    (D) $\mu = 0$

Topic 5: Padarthon ka Chumbakiya Vargikaran (Classification of Materials)

46. Nikell hai : [BSEB, 2018, 2023, 2026]

    (A) Anuchumbakiya

    (B) Pratichumbakiya

    (C) Lauhchumbakiya

    (D) Inmein se koi nahi

47. Tamba (Copper) hota hai : [BSEB, 2024 (A)]

    (A) Pratichumbakiya

    (B) Anuchumbakiya

    (C) Lauh-chumbakiya

    (D) Inmein se koi nahi

48. Loha hota hai : [BSEB, 2020 (A)]

    (A) Anuchumbakiya

    (B) Pratichumbakiya

    (C) Lauh chumbakiya

    (D) Achumbakiya

49. Drav aur gas hote hain : [BSEB, 2016 (A)]

    (A) Pratichumbakiya

    (B) Lauh-chumbakiya nahi

    (C) Anuchumbakiya

    (D) Inmein se koi nahi

50. Nimnalikhit mein se kaun-sa padarth chumbak se pratikarshit hota hai?

    (A) Loha

    (B) Cobalt

    (C) Tamba

    (D) Nikel

51. Superconductor (Atichalak) ka vyavhar hota hai :

    (A) Poorn anuchumbakiya

    (B) Poorn pratichumbakiya

    (C) Poorn lauh-chumbakiya

    (D) Achumbakiya

52. Cobalt hai :

    (A) Pratichumbakiya

    (B) Anuchumbakiya

    (C) Lauh-chumbakiya

    (D) Achumbakiya

53. Pratichumbakiya padarthon ki chumbakshilta :

    (A) Adhik hoti hai

    (B) Bahut kam hoti hai

    (C) Shunya rehti hai

    (D) Inmein se koi nahi

54. Shaithilya (Hysteresis) pradarshit karte hain :

    (A) Pratichumbakiya padarth

    (B) Anuchumbakiya padarth

    (C) Lauh-chumbakiya padarth

    (D) Inmein se koi nahi

55. Lauh-chumbakiya padarthon ke bheetar parmanvon ke samuh ko kehte hain :

    (A) Ion

    (B) Proton

    (C) Domain

    (D) Parmanu

Topic 6: Prithvi ka Chumbakatva (Earth’s Magnetism)

56. Naman kon $\delta$ ka maan $0^\circ$ hota hai :

    (A) Chumbakiya dhruvon par

    (B) Chumbakiya vishuvat rekha par

    (C) $45^\circ$ akshansh par

    (D) Inmein se koi nahi

57. Vishuvat rekha par naman kon ka maan hota hai : [BSEB, 2020 (A)]

    (A) $0^\circ$

    (B) $90^\circ$

    (C) $180^\circ$

    (D) Koi nahi

58. Chumbakiya yamyottar aur bhaugolik yamyottar ke beech ke kon ko kehte hain : [BSEB, 2023 (A)]

    (A) Chumbakiya nati

    (B) Chumbakiya dikpat

    (C) Chumbakiya aaghurn

    (D) Chumbakiya kshetra ki shakti

59. Prithvi ke chumbakiya dhruvon par nati kon hota hai : [BSEB, 2019, 2021]

    (A) $0^\circ$

    (B) $45^\circ$

    (C) $60^\circ$

    (D) $90^\circ$

60. Prithvi ka chumbakiya aaghurn hai : [BSEB, 2023 (A)]

    (A) $8.0$ J T$^{-1}$

    (B) $11.5$ J T$^{-1}$

    (C) $\pi$ J T$^{-1}$

    (D) $8.0 \times 10^{22}$ J T$^{-1}$

61. Naman kon ka maan $90^\circ$ kahan hota hai? [BSEB, 2012, 2021]

    (A) Vishuvat rekha par

    (B) Dhruvon par

    (C) Pratyek sthan par

    (D) Kahin nahi

62. Prithvi ke chumbakiya kshetra ka maan lagbhag hota hai : [BSEB, 2024 (A)]

    (A) $10^{-4}$ Tesla

    (B) $1$ Tesla

    (C) $10^{-10}$ Tesla

    (D) $10^4$ Tesla

63. Vishuvat rekha par chumbakiya sui rehti hai : [BSEB, 2012 (A)]

    (A) Kshaitiz

    (B) Udagr

    (C) $45^\circ$ ke kon par jhuki

    (D) Inmein se koi nahi

64. Naman kon ka maan Uttari dhruv se vishuvat rekha ki ore jaane par : [BSEB, 2020 (A)]

    (A) Sthir rehta hai

    (B) Badhta hai

    (C) Ghatt-ta hai

    (D) Pehle ghatt-ta hai phir badhta hai

65. Yadi $\delta$ kisi jagah ka naman kon hai, toh $\tan \delta$ ka vyanjak hota hai : [BSEB, 2020 (A)]

    (A) $\frac{B_V}{B_H}$

    (B) $\frac{B_H}{B_V}$

    (C) $B_V B_H$

    (D) $(\frac{B_V}{B_H})^2$

66. Ek sthan par naman aur prithvi ke chumbakiya kshetra ka kshaitiz ghatak kramshah $60^\circ$ aur $4 \times 10^{-5}$ Tesla hai. Us sthan par kshetra ka udagr ghatak hai :

    (A) $4 \times 10^{-5}$ T

    (B) $4\sqrt{3} \times 10^{-5}$ T

    (C) $\frac{4}{\sqrt{3}} \times 10^{-5}$ T

    (D) Inmein se koi nahi

67. Kisi sthan par aabhasi naman kon (Apparent Dip) hamesha hota hai :

    (A) Vastavik naman kon se kam

    (B) Vastavik naman kon se adhik

    (C) Vastavik naman kon ke barabar

    (D) Inmein se koi nahi

68. Prithvi ke chumbakiya kshetra ka kshaitiz ghatak $B_H$ dhruvon par hota hai :

    (A) Adhiktam

    (B) Shunya

    (C) $1$ Tesla

    (D) Anant

69. Yadi prithvi ke chumbakiya kshetra ka urdhvadhar ghatak $B_V$ aur kshaitiz ghatak $B_H$ barabar ho, toh naman kon hoga :

    (A) $30^\circ$

    (B) $45^\circ$

    (C) $60^\circ$

    (D) $90^\circ$

70. Parthiv chumbakatva (Earth Magnetism) ke avayav hain :

    (A) Dikpat ka kon (Declination)

    (B) Naman kon (Dip)

    (C) Kshaitiz ghatak ($B_H$)

    (D) Uparyukt sabhi

Topic 7: Karya, Urja evam Avartkal (Work, Energy & Time Period)

71. Ek saman chumbakiya kshetra mein dolansheel chumbak ke avartkal ka vyanjak hota hai : [BSEB, 2022 (A)]

    (A) $T = 2\pi\sqrt{\frac{I}{M B_H}}$

    (B) $T = 2\pi\sqrt{\frac{M B_H}{I}}$

    (C) $T = 2\pi\sqrt{\frac{I}{B_H}}$

    (D) $T = 2\pi\sqrt{\frac{M B_H}{I}}$

72. Ek saman chumbakiya kshetra mein chumbak ke vikshepan mein kiya gaya karya hota hai : [BSEB, 2022 (A)]

    (A) $W = MB(1 – \sin \theta)$

    (B) $W = MB \sin \theta$

    (C) $W = MB(1 – \cos \theta)$

    (D) $W = MB \cos \theta$

73. Prithvi ke chumbakiya kshetra $B_H$ mein yadi kisi chumbakiya sui ke dolan ki aavritti $n$ ho, toh : [BSEB, 2019, 2022]

    (A) $n \propto B_H$

    (B) $n^2 \propto B_H$

    (C) $n \propto B_H^2$

    (D) $n^2 \propto \frac{1}{B_H}$

74. Ek saman chumbakiya kshetra mein chumbak ke vikshepan mein sthitiz urja ka maan hota hai : [BSEB, 2022 (A)]

    (A) $U = -MB \cos \theta$

    (B) $U = -MB \sin \theta$

    (C) $U = MB (1 – \cos \theta)$

    (D) $U = MB \cos \theta$

75. Chumbakiya kshetra ki disha se kisi chumbak ko $90^\circ$ se ghumane mein sampanna karya hai :

    (A) $0$

    (B) $MB/2$

    (C) $1 MB$

    (D) $2 MB$

76. $M$ chumbakiya aaghurn ka ek chumbakiya dvidhruv $B$ tivrata ke samarup chumbakiya kshetra mein samyavastha mein hai. Isse $180^\circ$ ghumane mein krit karya hoga :

    (A) $-MB$

    (B) $+MB$

    (C) Shunya

    (D) $+2MB$

77. Ek saman chumbakiya kshetra mein dhage se latke ek chumbak ka avartkal $T$ hai. Yadi iska chumbakiya aaghurn chaar guna kar diya jaye, toh naya avartkal hoga :

    (A) $T/2$

    (B) $2T$

    (C) $T/4$

    (D) $4T$

78. Chumbakiya kshetra ki urja ghanatva ka sutra hai :

    (A) $B^2 / 2\mu_0$

    (B) $B / 2\mu_0$

    (C) $B^2 \mu_0 / 2$

    (D) $\mu_0 / 2B^2$

79. Chumbakiya kshetra mein rakhe chumbakiya dvidhruv ki nyuntam sthitiz urja kab hoti hai?

    (A) $\theta = 0^\circ$

    (B) $\theta = 90^\circ$

    (C) $\theta = 180^\circ$

    (D) $\theta = 45^\circ$

80. Chumbakiya kshetra mein rakhe chumbakiya dvidhruv ki adhiktam sthitiz urja kab hoti hai?

    (A) $\theta = 0^\circ$

    (B) $\theta = 90^\circ$

    (C) $\theta = 180^\circ$

    (D) $\theta = 360^\circ$

Topic 8: Curie Tap evam Niyam (Curie Temperature & Law)

81. Curie tap ke upar lauh-chumbakiya padarth ho jate hain : [BSEB, 2024 (A)]

    (A) Anuchumbakiya

    (B) Pratichumbakiya

    (C) Ardhchalak

    (D) Vidyutrodhi

82. Lauh-chumbakiya padarthon ke liye Curie ka niyam hai : [BSEB, 2016 (A)]

    (A) $\chi \propto \frac{1}{T – T_c}$

    (B) $\chi \propto T$

    (C) $\chi \propto T^2$

    (D) $\chi = \text{constant}$

83. Anuchumbakiya padarthon ke liye chumbakiya pravriti $\chi$ ki param tap $T$ par nirbharta hogi :

    (A) $\chi \propto T$

    (B) $\chi \propto \frac{1}{T}$

    (C) $\chi = e^{kT}$

    (D) $\chi = \text{sthirank}$

84. Curie niyam ke anusar anuchumbakiya padarth ki pravriti $\chi$ aur tap $T$ mein sambandh hai :

    (A) $\chi \propto T$

    (B) $\chi \propto 1/T$

    (C) $\chi = T$

    (D) $\chi = T^2$

85. Padarth ki vah avastha jismein chumbakiya pravriti tap par nirbhar nahi karti :

    (A) Lauh-chumbakiya

    (B) Anuchumbakiya

    (C) Pratichumbakiya

    (D) Inmein se koi nahi

Topic 9: Vidyut Chumbak evam Sthayi Chumbak (Electro-magnets & Permanent Magnets)

86. Sthayi chumbak banane ke liye sabse upyukt padarth hai : [BSEB, 2015 (A)]

    (A) Steel

    (B) Narm loha

    (C) Tamba

    (D) Nickel

87. Vidyut chumbak narm lohe ke banaye jate hain, kyunki narm loha rakhti hai :

    (A) Adhik chumbakiya pravriti tatha kam dharanshilta

    (B) Adhik chumbakiya pravriti tatha adhik dharanshilta

    (C) Adhik chumbakshilta tatha adhik dharanshilta

    (D) Kam chumbakshilta tatha adhik dharanshilta

88. Sthayi chumbak ke liye nimn mein se kya avashyak hai?

    (A) Uchch nigrahiya (Coercivity)

    (B) Uchch dharanshilta (Retentivity)

    (C) Dono (A) aur (B)

    (D) Nimn nigrahiya

89. Vidyut chumbak ke liye sabse upyukt hai :

    (A) Ispat

    (B) Tamba

    (C) Naram loha

    (D) Aluminium

90. Vidyut chumbak banane ke liye steel ka upyog nahi kiya jata kyunki :

    (A) Iski dharanshilta kam hai

    (B) Iski nigrahiya (Coercivity) adhik hai

    (C) Yeh sasta nahi hai

    (D) Yeh bhari hai

91. Narm lohe ki dharanshilta (Retentivity) hoti hai :

    (A) Adhik

    (B) Kam

    (C) Shunya

    (D) Rinatmak

92. Sthayi chumbak ke padarth mein hona chahiye :

    (A) Uchch nigrahiya

    (B) Uchch dharanshilta

    (C) Nimn nigrahiya

    (D) Vikalp (A) aur (B) dono

Topic 10: Chumbakiya Vibhav evam Bindu (Magnetic Potential & Points)

93. Chumbakiya vibhav ka matrak hota hai : [BSEB, 2025 (A)]

    (A) Joule/ampere-meter (J/A-m)

    (B) Weber/meter

    (C) Tesla-meter

    (D) Inmein se koi nahi

94. Udasin binduon par : [BSEB, 2025 (A)]

    (A) $B > B_H$

    (B) $B < B_H$

    (C) $B = B_H$

    (D) $B = 0$

95. Dhruv prabalta $m$ se $r$ doori par chumbakiya vibhav ka maan hota hai : [BSEB, 2024 (A)]

    (A) $\frac{\mu_0}{4\pi} \frac{m}{r}$

    (B) $\frac{\mu_0}{4\pi} \frac{m}{r^2}$

    (C) $\frac{\mu_0}{4\pi} \frac{m^2}{r}$

    (D) Shunya

96. Chumbakiya vibhav ka maan $r$ doori par kis prakar badalta hai?

    (A) $V \propto 1/r$

    (B) $V \propto 1/r^2$

    (C) $V \propto r$

    (D) $V \propto r^2$

97. Yadi kisi chumbak ka chumbakiya aaghurn $M$ hai, toh iske nirakshiya sthiti mein chumbakiya vibhav hoga :

    (A) $\frac{\mu_0}{4\pi} \frac{M}{r^2}$

    (B) Shunya

    (C) $\frac{\mu_0}{4\pi} \frac{M}{r}$

    (D) Anant

Topic 11: Chumbakiya Sutra evam Sambandh (Formulae & Relations)

98. Nimnalikhit mein kaun sambandh sahi hai? [BSEB, 2022 (A)]

    (A) $B^2 = B_H^2 + B_V^2$

    (B) $B^2 = B_H^2 – B_V^2$

    (C) $B^2 = B_V^2 – B_H^2$

    (D) $B = \frac{B_V}{B_H}$

99. Nimnalikhit mein kaun tangent niyam ke liye sahi hai? [BSEB, 2022 (A)]

    (A) $B = B_H \tan \theta$

    (B) $B = B_H^2 \tan \theta$

    (C) $B = \sqrt{B_H} \tan \theta$

    (D) $B = B_H \tan^2 \theta$

100. Chumbakiya yamyottar mein parthiv chumbakiya kshetra $B$, naman kon $\delta$, $B$ ka kshaitiz ghatak $B_H$ aur $B$ ka udagr ghatak $B_V$ ho toh nimnalikhit mein kaun sahi hai? [BSEB, 2021 (A)]

     (A) $B_H = B \cos \delta$

     (B) $B_V = B \cos \delta$

     (C) $B_H = B \sin \delta$

     (D) $B_V = B_H \sin \delta$

101. Chumbak ke $\tan A$ tatha $\tan B$ sthiti mein doori $d$ par chumbakiya kshetra kramshah $B_1$ tatha $B_2$ ho, toh : [BSEB, 2009 (A)]

     (A) $B_1 = \frac{\mu_0}{4\pi} \cdot \frac{2Md}{(d^2 – l^2)^2}, B_2 = \frac{\mu_0}{4\pi} \cdot \frac{M}{(d^2 + l^2)^{3/2}}$

     (B) $B_1 = B_2; d >> l$

     (C) $B_1 = 2B_2; d >> l$

     (D) Dono ‘A’ aur ‘C’

102. Nimnalikhit mein kaun sahi nahi hai?

     (A) $\chi = \frac{M}{H}$

     (B) $\frac{B}{\mu_0} = (1 + \chi) H$

     (C) $\mu_0 = \mu (1 + \chi)$

     (D) $\mu_r = 1 + \chi$

103. Chumbakiya kshetra ($B$) aur chumbakan tivrata ($M$) mein kya sambandh hai?

     (A) $B = \mu_0 (H + M)$

     (B) $M = \chi H$

     (C) Dono (A) aur (B)

     (D) Inmein se koi nahi

104. Kisi madhyam ki chumbakshilta $\mu$ ka maan hota hai :

     (A) $\mu = B/H$

     (B) $\mu = H/B$

     (C) $\mu = B \cdot H$

     (D) $\mu = B + H$

Topic 12: Akshiya evam Nirakshiya Sthiti (Axial & Equatorial Positions)

105. Kisi chhote chumbak ke madhya bindu se saman doori par akshiya tatha nirakshiya sthiti mein chumbakiya kshetron ka anupat hota hai :

     (A) $1 : 2$

     (B) $2 : 1$

     (C) $\sqrt{2} : 1$

     (D) $1 : \sqrt{2}$

106. Nimnalikhit mein kaun chhote chumbak ke liye kaun sahi hai? [BSEB, 2022 (A)]

     (A) $(B)_{\text{akshiya}} = (B)_{\text{nirakshiya}}$

     (B) $(B)_{\text{akshiya}} = 2(B)_{\text{nirakshiya}}$

     (C) $(B)_{\text{nirakshiya}} = 2(B)_{\text{akshiya}}$

     (D) $(B)_{\text{akshiya}} = 3(B)_{\text{nirakshiya}}$

107. Chumbakiya dvidhruv ki akshiya sthiti mein chumbakiya kshetra ki disha hoti hai :

     (A) $S$ se $N$ dhruv ki ore

     (B) $N$ se $S$ dhruv ki ore

     (C) Lambvat

     (D) Anishchit

Topic 13: Vidyut Chumbakiya Tarange evam Prabhav (EM Waves & Effects)

108. Visthapan dhara (Displacement Current) ka matrak hota hai : [BSEB, 2026]

     (A) Am

     (B) A

     (C) $\Omega A$

     (D) $V$

109. Television ke remote control mein upyog hoti hain : [BSEB, 2026]

     (A) Parabengni tarange

     (B) Avrakt (Infrared) tarange

     (C) Radio tarange

     (D) Sukshm tarange

110. Vidyut chumbakiya tarangon ko sarvapratham ganitiya rup mein kisne samjhaya? [BSEB, 2026]

     (A) Einstein

     (B) Faraday

     (C) Maxwell

     (D) Hertz

111. Vidyut chumbakiya tarang mein vidyutiya evam chumbakiya kshetron ke beech kalantar hota hai : [BSEB, 2009 (A)]

     (A) $0$

     (B) $\pi/2$

     (C) $\pi$

     (D) Kuch bhi

112. Vidyut dhara ke chumbakiya prabhav ki khoj kisne ki thi?

     (A) Faraday

     (B) Oersted

     (C) Ampere

     (D) Maxwell

Topic 14: Upkaran evam Galvenometer (Instruments)

113. Nimnalikhit mein kaun galvanometer niyatank ke liye sahi hai? [BSEB, 2022 (A)]

     (A) $\frac{C}{NAB}$

     (B) $\frac{C(B)}{NA}$

     (C) $\frac{C(A)}{NB}$

     (D) $\frac{C(N)}{AB}$

114. Yadi $\phi$ ek chhota kon ho, toh tangent galvanometer ki sugrahita (Sensitivity) adhiktam hoti hai jab vikshep hota hai : [BSEB, 2018 (A)]

     (A) $0^\circ$

     (B) $30^\circ$

     (C) $45^\circ$

     (D) $90^\circ$

115. Chal kundal galvanometer (Moving Coil Galvanometer) ki sugrahita badhai ja sakti hai :

     (A) Kundli ka kshetraphal ghatakar

     (B) Chumbakiya flux ghatakar

     (C) Pheron ki sankhya ($N$) badhakar

     (D) Marodi niyatank ($k$) badhakar

116. Ek adarsh ammeter ka pratirodh hota hai : [BSEB, 2019 (A)]

     (A) Kam

     (B) Adhik

     (C) Shunya

     (D) Anant

117. Ek adarsh voltmeter ka pratirodh hota hai : [BSEB, 2021 (A)]

     (A) Shunya

     (B) Bahut kam

     (C) Bahut adhik

     (D) Anant

118. Cyclotron ka upyog kisse tvarit karne ke liye kiya jata hai? [BSEB, 2021 (A)]

     (A) Electron

     (B) Neutron

     (C) Dhan aveshit kan (jaise Proton)

     (D) Inmein se koi nahi

Topic 15: Vividh evam Miscellaneous (Miscellaneous)

119. $B_0^2 / \mu_0$ ki vimaye vahi hongi jo : [BSEB, 2026]

     (A) Urja ghanatva ki hogi

     (B) Karya ki hogi

     (C) Samveg ki hogi

     (D) Vaidyut flux ki hogi

120. Pare ke bane kisi golak ko chumbakiya kshetra mein dolan karne par uski dolan gati hoti hai : [BSEB, 2024 (A)]

     (A) Tvarit

     (B) Avmandit

     (C) Ek saman

     (D) Inmein se koi nahi

121. Ek sidha chalak chhad purv-pashchim ki ore kshaitiz sthir rakha gaya hai. Isse girne ke liye chhod diya jata hai. Iske siron ke beech vibhavantar : [BSEB, 2017 (C)]

     (A) Shunya rahega

     (B) Badhta jayega

     (C) Ghatt-ta jayega

     (D) Ki disha badalti rahegi

122. Chumbakiya kshetra ($\vec{B}$) mein sthit $\vec{M}$ chumbakiya aaghurn wale dhara pash dvara anubhut bal aaghurn ka maan hota hai : [BSEB, 2019, 2024]

     (A) $\vec{\tau} = \vec{M} \times \vec{B}$

     (B) $\vec{\tau} = \vec{B} \times \vec{M}$

     (C) $\vec{\tau} = \frac{\vec{M}}{\vec{B}}$

     (D) $\vec{\tau} = \vec{M} \cdot \vec{B}$

123. Kuch padarthon ki chumbakshilta $1$ se kam hai. Unki chumbakiya pravriti hogi :

     (A) Dhanatmak evam badi

     (B) Dhanatmak evam chhoti

     (C) Shunya

     (D) Rinatmak

124. Nimnalikhit mein se kin padarthon ki pravriti bahya kshetra mein mazboot chumbakiya kshetra se kamzor chumbakiya kshetra ki ore jaane ki hoti hai? [BSEB, 2018 (C)]

     (A) Pratichumbakiya padarth

     (B) Anuchumbakiya padarth

     (C) Lauhchumbakiya padarth

     (D) Inmein se koi nahi

125. Nimnalikhit mein se kinki chumbakshilta adhik hogi?

     (A) Anuchumbakiya

     (B) Pratichumbakiya

     (C) Lauh chumbakiya

     (D) Inmein se koi nahi

126. Ek chumbakiya sui, asaman chumbakiya kshetra mein rakhi gayi hai. Sui anubhav karegi :

     (A) Ek bal aur ek torque

     (B) Ek bal, parantu torque nahi

     (C) Ek torque, parantu bal nahi

     (D) Na toh bal aur na hi torque

127. Plank sthirank ki vima hai : [BSEB, 2020 (A)]

     (A) $ML^2 T^{-1}$

     (B) $ML^2 T^{-2}$

     (C) $ML T^{-1}$

     (D) $ML T^{-2}$

128. Chumbak ke chumbakatva ka karan hai :

     (A) Prithvi ke bheetar ek bade chumbak ki upasthiti

     (B) Prithvi ki ghurnan gati

     (C) Electronon ki spin gati

     (D) Brahmandiya kirne

129. Thos kon (Solid Angle) ka matrak hai : [BSEB, 2025 (A)]

     (A) Radian

     (B) Steradian

     (C) Degree

     (D) Candela

130. Chumbakiya vibhav ka maan $r$ doori par kis prakar badalta hai?

     (A) $V \propto 1/r$

     (B) $V \propto 1/r^2$

     (C) $V \propto r$

     (D) $V \propto r^2$

131. Ampere ka paripathiya niyam sambandhit hai :

     (A) Vidyut kshetra se

     (B) Chumbakiya kshetra se

     (C) Gurutvakarshan se

     (D) Gharshan se

132. Kisi chumbakiya kshetra mein gatiman avesh par lagne wala bal kehlata hai :

     (A) Coulomb bal

     (B) Lorentz bal

     (C) Nabhikiya bal

     (D) Gharshan bal

133. Chumbakiya kshetra rekhaye ek-dusre ko kabhi nahi kaatti kyunki :

     (A) Ve band loop banati hain

     (B) Katan bindu par kshetra ki do dishaye asambhav hain

     (C) Ve samantar hoti hain

     (D) Ve bahut kamzor hoti hain

134. Meissner prabhav (Meissner effect) sambandhit hai :

     (A) Ardhchalak se

     (B) Atichalak se

     (C) Kuchalak se

     (D) Vidyut rodhi se

135. Chumbakiya sui ka vikshep adhiktam hota hai :

     (A) Dhruvon par

     (B) Vishuvat rekha par

     (C) Akshiya sthiti mein

     (D) Inmein se koi nahi

136. Chumbakatva ka Gauss niyam batata hai ki :

     (A) Ekal chumbakiya dhruv ka astitva nahi hota

     (B) Chumbakiya dhruv hamesha jode mein hote hain

     (C) Dono (A) aur (B)

     (D) Chumbakiya dhruv alag kiye ja sakte hain

137. Kisi chumbakiya kshetra mein vrittakar path par ghumne wale kan ka avartkal nirbhar nahi karta :

     (A) Dravyaman par

     (B) Veg par

     (C) Avesh par

     (D) Chumbakiya kshetra par

138. Helmholtz kundliyon ka upyog utpanna karne ke liye kiya jata hai :

     (A) Asaman chumbakiya kshetra

     (B) Ek saman chumbakiya kshetra

     (C) Vidyut kshetra

     (D) Pratyavarti dhara

139. Prithvi ke chumbakatva ka mukhya srot mana jata hai :

     (A) Dynamo prabhav (Dynamo Effect)

     (B) Surya ki kirne

     (C) Chandrama ka prabhav

     (D) Sagar ki lehre

140. Chumbakiya yamyottar (Magnetic Meridian) hai :

     (A) Ek bindu

     (B) Ek rekha

     (C) Ek urdhvadhar tal

     (D) Ek kshaitiz tal

141. Pratichumbakiya padarthon ke liye apekshik chumbakshilta $\mu_r$ hoti hai :

     (A) $\mu_r > 1$

     (B) $\mu_r < 1$

     (C) $\mu_r = 1$

     (D) $\mu_r = 0$

142. Kisi chumbakiya kshetra $B$ mein vikshepit sui par torque $\tau$ ka maan hota hai : [BSEB, 2018 (A)]

     (A) $MB \sin \theta$

     (B) $MB \cos \theta$

     (C) $MB \tan \theta$

     (D) Shunya

143. Platinum ki chumbakiya pravriti $0.0001$ hai. Iske apekshik chumbakshilta ka maan hai :

     (A) $1.0000$

     (B) $1.9999$

     (C) $1.0001$

     (D) $0$

144. Chumbakshilta ($\mu$) ke liye nimnalikhit mein kaun sambandh sahi hai? [BSEB, 2021 (A)]

     (A) $\mu = \frac{H}{B}$

     (B) $\mu = \frac{B}{H}$

     (C) $\mu = B \cdot H$

     (D) $\mu = (B + H)$

145. Chumbakan tivrata (Intensity of Magnetization) ka S.I. matrak hai : [BSEB, 2022 (A)]

     (A) $A/m$

     (B) $A/m^2$

     (C) $Am$

     (D) $Am^2$

146. Anuchumbakiya padarthon ki chumbakiya sugrahita ($\chi$) hoti hai :

     (A) Dhanatmak aur chhoti

     (B) Dhanatmak aur badi

     (C) Rinatmak

     (D) Shunya

147. Yadi chumbak ko lambai ke anudish do bhagon mein kaata jaye toh pratyek bhag ka chumbakiya aaghurn :

     (A) $M/2$

     (B) $M$

     (C) $2M$

     (D) Shunya

148. Chumbakiya dvidhruv aaghurn ka matrak hai :

     (A) $Am^2$

     (B) $J/T$

     (C) Dono (A) aur (B)

     (D) Newton

149. Nirakshiya sthiti mein chumbakiya dvidhruv ke karan chumbakiya kshetra ki tivrata hoti hai :

     (A) $\frac{\mu_0}{4\pi} \frac{M}{r^3}$

     (B) $\frac{\mu_0}{4\pi} \frac{2M}{r^3}$

     (C) Shunya

     (D) Anant

150. Vidyut chumbakatva ke janak kise mana jata hai?

     (A) Ampere

     (B) Faraday

     (C) Oersted

     (D) Maxwell