Current Electricity

Bihar Board Class 12 · Physics · 60 past questions

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1. Q6 2026 Set A

   Which of the following expressions represents electrical energy ?

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2. Q10 2025 Set D

   Kilowatt-hour (kWh) is the unit of

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3. Q18 2025 Set D2021 Set A

   Power of electric circuit is

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4. Q19 2024 Set A

   Two bulbs of 40 W and 60 W are connected to 220 V source. The ratio of their resistances will be

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5. Q28 2023 Set F

   Two resistors R and 2R are connected in series in an electric circuit. The thermal energy developed in R and…

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6. Q38 2021 Set A

   The heat produced in a conductor of resistance $R$ due to flow of current $I$ for time $t$ is

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7. Q45 2019

   Power of an electric – circuit is

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8. Q46 2019

   When two bulbs of power 60 W and 40 W are connected in series, then the power of their combination will be

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9. Q48 2019

   At constant potential difference, the resistance of any electric circuit is halved, the value of heat…

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10. Q50 2019

    Two resistors of resistance ratio 3:4 are connected in parallel. Compare the magnitude of heat produced in…

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11. Q56 2017

    Absorbed electrical energy is-

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12. Q59 2017

    A bulb rated 100w. 220 V is connected across 240 Volt. Calculate electrical power loss.

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