Question

When the frequency of applied emf in an $L-C-R$ series circuit is less than the resonant frequency, then the nature of the circuit will be

• A. capacitive
• B. resistive
• C. inductive
• D. all of the above

Answer 1

The correct option is A capacitive

Resonant frequency $=\frac{1}{2\pi \sqrt{LC}}$

at $f<\frac{1}{2\pi \sqrt{LC}}$, total reactance $=2\pi fL-\frac{1}{2\pi fC}$ < 0 .

Therefore capacitive.