Current Electricity

Bihar Board Class 12 · Physics · 60 past questions

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1. Q1 2026 Set A

   A cell of internal resistance $r$ is connected to an external resistance $R$. The current will be maximum in…

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2. Q12 2025 Set D

   The graph between voltage $V$ of a conductor and current $I$ is a straight line which makes an angle $\theta$…

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3. Q17 2025 Set D

   If the length of a conductor is doubled while keeping the potential difference across it constant, then the…

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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. Q20 2024 Set A

   The resistance of any wire is 500 $\Omega$. Its electrical conductivity will be

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6. Q21 2024 Set A

   $n$ equal resistors are first connected in series and then in parallel. The ratio of maximum and minimum…

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7. Q32 2022 Set I

   Which of the following is correct?

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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. Q50 2019

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

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10. Q54 2018

    Using theory of dirft velocity, express Ohm's law.

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11. Q55 2017

    Two cells of emf $\varepsilon_1$ and $\varepsilon_2$, internal resistance $r_1$ and $r_2$, connected in…

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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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13. Q60 2017

    What is Wheatstone bridge? Explain its use in detail.

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