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Understanding Electric Potential

A series LCR ...

Question

A series LCR circuit is connected to an external ac source of emf50 V. If at resonance the potentialacross capacitor is 200 V, then the quality factor of the circuit will be?

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Solution

$Q u a l i t y f a c t o r Q = \frac{v o l t a g e a c r o s s c a p a c i t o r}{v o l t a g e a c r o s s r e s i s \tan c e} = \frac{200}{50} = 4$

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