Alternating Current

Bihar Board Class 12 · Physics · 41 past questions

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1. Q1 2026 Set A

   Which quantity decreases in step-down transformer ?

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2. Q10 2025 Set D2023 Set F

   In a step-up transformer, the value of current in secondary compared to the primary coil is

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3. Q23 2022 Set I

   Transformation ratio in transformer is

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4. Q25 2022 Set I

   Which of the following is correct for step-up transformer ?

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5. Q31 2021 Set A

   Which of the following is correct for transformer ?

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6. Q33 2019

   In a step-up transformer, no, of turns in primary and secondary coils are $N_1$ and $N_2$, then

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