Physics 2004 JAMB Past Questions - Question 27: the energy stored in an inductor of inductance 5mh when a current of 6A flows through it is

Correct Answer

B

Explanation

The energy stored in an inductor can be calculated using the formula for the energy stored in an inductor:

Energy (W) = (1/2) * L * I^2

Where:
W = Energy stored in the inductor (in joules)
L = Inductance of the inductor (in henries, H)
I = Current flowing through the inductor (in amperes, A)

In your case, the inductance (L) is given as 5 mH, which is equivalent to 0.005 H, and the current (I) is 6 A. Plug these values into the formula:

W = (1/2) * (0.005 H) * (6 A)^2

W = (1/2) * 0.005 H * 36 A^2

W = 0.5 * 0.005 H * 36 A^2

W = 0.5 * 0.18 H*A^2

W = 0.09 joules

So, the energy stored in the inductor with an inductance of 5 mH when a current of 6 A flows through it is 0.09 joules.