a If an inductor carrying a 195 A current stores an energy o

(a) If an inductor carrying a 1.95 A current stores an energy of 0.250 mJ, what is its inductance?


(b) How much energy does the same inductor store if it carries a 2.7 A current?

Solution

a) W (in Joules) = 1/2 * L * I^2

So 0.250 * 10^-3= 0.5 * L * (1.95)^2 which yields 1.3 * 10^-4 Henrys

b) Energy Stored =

1/2 * L* I*2 = 1/2 * 1.3 *10^-4 *2.7*2.7 = .473 mJ