Question

The emf E = 4 cos (1000t) volt is applied to an L-R circuit containing inductance 3 mH and resistance 4Ω. The amplitude of current is :

(a) 4√7 A 

(b) 1.0 A 

(c) 4/7 A 

(d) 0.8 A

Answer 1

Correct option (d) 0.8 A

Explanation:

From the formula of impedance