First slide

Phasors and Phasor Diagrams

Question

Statement 1: In a series LCR circuit at resonance condition, power consumed by the circuit is maximum.
Statement 2: At resonance condition, effective resistance of circuit is maximum.

Easy

A

Both statements 1 and 2 are correct
B

Statement 1 is correct statement 2 is incorrect
C

Statement 1 is incorrect statement 2 is correct
D

Both statements 1 and 2 are incorrect

Solution

Power consumed by an aaaaaac circuit is P = I $I_{r m s} V_{r m s} \cos ϕ . A t r e s o n a n c e ϕ = 0, s o p o w e r c o n s u m e d i s m a x i m u m . A l s o i m p e d a n c e Z = \sqrt{R^{2} + {(X_{L} - X_{c})}^{2}} . A t r e s o n a n c e X_{L} = X_{c}, s o Z i s m i n i m u m a n d c u r r e n t b e c o m e s m a x i m u m$

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