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Q#1 Sinusoidal Steady State Analysis GATE EE 2001 MCQ +1 mark -0.33 marks

In a series RLC circuit at resonance, the magnitude of the voltage developed across the capacitor.

Is always zero

Can never be greater than the input voltage

Can be greater than the input voltage, however, it is 90° out of phase with the input voltage.

Can be greater than the input voltage, and is in phase with the input voltage.

Explanation:

Current in series RLC circuit is,

78.jpg

Under Resonance Condition,

         (in phase with voltage source)

Voltage across capacitor

if ; then = so  can be greater than voltage source and  is  phase behind the source voltage.

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