Two inductors of inductances 5mll and 15mll are connected in series and a current of 5A flows through them. The total energy stored in the inductor is?

A. 500.0J
B. 250.0J
C. 62.5J
D. 50.0J
E. no correct option

Correct Answer:

Option E = no correct option

Explanation

Total inductance,L = L¹ + L² = m
15 + 5 = 20mH = (20)H/1000
1 = 5A
Energy of inductor, ½LI²
= (1)/2 X (20)/1000 X 5‾²
= 0.25 J