Alternating Current

Bihar Board Class 12 · Physics · 41 past questions

9 of 41 · show all

1. Q5 2026 Set A

   Choke coil works on the principle of

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2. Q7 2025 Set D

   In a purely inductive circuit, the power factor is

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3. Q14 2024 Set A

   If the phase difference between alternating current and e.m.f. is $\phi$, then the value of power factor is

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4. Q15 2024 Set A

   In $AC$ circuit, power is lost in only

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5. Q20 2022 Set I

   The expression for real average power in an alternating current circuit is

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6. Q21 2022 Set I

   Power factor is equal to

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7. Q30 2021 Set A

   Which of the following relations is correct for power factor ?

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8. Q34 2019

   The power factor of L-R circuit is

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9. Q35 2019

   In an alternating current circuit, the phase difference between curren I and voltage $\phi$, then the Wattles…

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