Electromagnetic Induction

Bihar Board Class 12 · Physics · 21 past questions

1. Q1 2026 Set A

   If $L$ and $R$ represent inductance and resistance respectively, then the unit of $L/R$ will be

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2. Q2 2026 Set A

   An example of natural electromagnetic induction is

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3. Q3 2026 Set A

   If magnetic field is same but the area of the loop is increased, then the flux

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4. Q4 2025 Set D

   Which of the following laws is based on the principle of energy conservation?

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5. Q5 2025 Set D

   Which of the following devices is based on the principle of electromagnetic induction?

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6. Q6 2025 Set D

   The self-inductance of a solenoid depends on

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7. Q7 2024 Set A

   S.I. unit of self-induction is

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8. Q8 2024 Set A

   On oscillating any metallic sphere in the magnetic field, its oscillatory motion is

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9. Q9 2024 Set A

   The working principle of dynamo is based on

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10. Q10 2024 Set A

    A magnet is situated near a closed conductor. Current can be produced in the conductor, if

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11. Q11 2024 Set A

    What is produced by induction coil ?

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12. Q12 2024 Set A

    If magnetic field $\vec{B}$ is perpendicular to surface area vector $d\vec{s}$, then the magnetic flux on…

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13. Q13 2023 Set F

    When current in a coil changes from 5A to 2A in 0.1s then average voltage of 50V is produced. The…

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14. Q14 2023 Set F

    The self-inductance of a choke coil is 5 henry. The current through it is increasing at a rate of 2…

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15. Q15 2022 Set I

    S.I. unit of magnetic flux is

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16. Q16 2022 Set I

    Lenz's law is the result of which principle of conservation ?

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17. Q17 2021 Set A

    One henry is equal to

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18. Q18 2019

    The working of dynamo is based on the principle of

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19. Q19 2019

    Lenz's law of electromagnetic induction follows the principle of conservation of energy. Discuss it.

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20. Q20 2018

    What are Eddy currents? Give its two uses.

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21. Q21 2018

    When a magnet is moved towards a suspended wire loop as shown in figure then evaluate the direction of… (with a figure)

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