CUET · PHYSICS · PYQ PAPER 2023
An inductor coil joined to a 12 V battery draws a steady current of 12 A. This coil is connected to a capacitor and ac source of rms voltage 12 V in series. What will be the rms current, if the current in the circuit is in phase with the emf?
- A 12A
- B 17 A
- C 8.6A
- D Zero
Answer & Solution
Correct Answer
(A) 12A
Step-by-step Solution
Detailed explanation
\( R = \frac{V_{DC}}{I_{DC}} = \frac{12 \, \text{V}}{12 \, \text{A}} = 1 \, \Omega \) Current in phase with emf implies resonance: \( Z = R \) \( I_{rms} = \frac{V_{rms}}{Z} = \frac{12 \, \text{V}}{1 \, \Omega} = 12 \, \text{A} \)
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