Question

A 2 mF capacitor, 100 W resistor and 8 H inductor

are connected in series with an ac source

(i) What should be the frequency of the

source such that current drawn in the circuit is

maximum? What is this frequency called?

(ii) If the peak value of emf of the source is

200 V, nd the maximum current.

(iii) Draw a graph showing variation of amplitude

of circuit current with changing frequency of

applied voltage in a series LCR circuit for two

dierent values of resistance R1 and R2 (R1 > R2).

(iv) Dene the term ‘Sharpness of Resonance’.

Under what condition, does a circuit become

more selective?

Answer 1

Answer:

frequency is 2

current is volt by time

graph no idea