Question

In an $L-C-R$ circuit

• A. the impedance is equal to reactance
• B. the ratio between effective voltage to effective current is called reactance
• C. at resonance the resistance is equal to the reactance
• D. the current flowing is called wattless current
• E. at resonance the net reactance is zero

Answer 1

Answer: (E)

We know the conditon of resonance in an $L-C-R$ circuit.
$X=X_L-X_C=0$
So, in an $L-C-R$ circuit at resonance the net reactance is zero.