Question

Q factor for a series resonant circuit is?

(a) Q = \(\frac{X_L}{R} = \frac{X_C}{R}\)

(b) Q = XL R = XC R

(c) Q = \(\frac{R}{X_L} = \frac{R}{X_C}\)

(d) Q = \(\frac{1}{R}\)

This question was posed to me in final exam.

Enquiry is from Qmeter topic in section Electronic Instruments of Electrical Measurements

Answer 1

The correct option is (a) Q = \(\frac{X_L}{R} = \frac{X_C}{R}\)

Explanation: Q factor in a series resonant circuit is given by the relation,

Q = \(\frac{X_L}{R} = \frac{X_C}{R}\)

where, R is resistance of the coil

            XC is the capacitive reactance

            XL is the inductive reactance.