1.

Assertion : Resonance is exhibited by a circuit only if both L and C are present in the circuit. Reason : Only then the voltage across L and C cancel each other, both being out of phase.A. If both assertion ans reason are true ans reaason is the correct explanation of assertion.B. If both assertion and reason are true but reason is not the correct explanation of assertion.C. If assertion istrue but reason is false.D. If both assertion and reason are false.

Answer» Correct Answer - A
The resonance phenomenon is exhibited by a circuit only if both L and C are present in the circuit. Only then the voltages across L and C cancel each other since both being out of phase and current amplitude is `V_(m//R)`, the total source voltage appearing across R. This means that we cannot have resonance in a RL or RC circuit.


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