Question

An ideal choke takes a current of 8 A when connected to an ac source of 100 volt and 50 Hz. A pure resistor under the same conditions takes a current of 10 A. If two are connected in series to an ac supply of 100 V and 40 Hz, then the current in the series combination of above resistor and inductor is

(a) 10A 

(b) 8A 

(c) 5 √2 amp 

(d) 10 √2 amp

Answer 1

The correct option is (c).

Explanation:

So impedance of the series RC circuit at a frequency of 40 Hz is