Alternating Current

CBSE Class 12 · Physics · 10 past questions

1. Q1 2026

   In a series LCR circuit, the voltage across the resistor, capacitor and inductor is 10 V each. If the…

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2. Q2 2025

   Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…

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3. Q3 2025

   A transformer is connected to a 200 V ac source. The transformer supplies 3000 V to a device. If the number…

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4. Q4 2025

   For Questions 13 to 16, two statements are given – one labelled Assertion (A) and other labelled Reason (R).…

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5. Q5 2024

   The reactance of a capacitor of capacitance C connected to an ac source of frequency $\omega$ is 'X'. If the…

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6. Q6 2024

   Which of the following quantity/quantities remains same in primary and secondary coils of an ideal…

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7. Q7 2024

   A resistor and an ideal inductor are connected in series to a $100\sqrt{2}$ V, 50 Hz ac source. When a…

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8. Q8 2023

   A series CR circuit with R = 200 Ω and C = (50/π) μF is connected across an ac source of peak voltage ε₀ =…

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9. Q9 2023

   An inductor, a capacitor and a resistor are connected in series across an ac source of voltage. If the…

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10. Q10 2023

    A voltage signal is described by…

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