First slide

Electrical Resonance series circuit

Question

When LCR series circuit is in state of resonance, its resistance is doubled, then

Moderate

A

Q-factor of circuit will increase
B

Q-factor of circuit will decrease
C

Q-factor of circuit remains unchanged
D

Frequency of resonance will be halved

Solution

Q factor $\frac{1}{R} \sqrt{\frac{L}{C}}$

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