Question

In LCR circuit, the capacitance is changed from C to 4C. For the same resonant frequency, the inductance should be : 

(a) L/2

(b) L /4

(c) 4L 

(d) 2L

Answer 1

Correct option (b) L /4

Explanation:

In an LCR circuit, resonance frequency is given by

Answer 2

For resonance:

For same resonant frequency: 

LC should be constant.