Question

A coil has an inductance of 7.00 mH, and the current in it changes from 0.200 A to 1.50 A in a time interval of 0.250 s. Find the magnitude of the average induced emf in the coil during this time interval.

Answer 1

Magnitude of the average induced emf = 36.4 mv

Step-by-step explanation:

Given:

inductance of the coil (L) = 7 mH

Initial current (Ci) = 0.200 A

Final current (Cf) = 1.50 A

Interval = 0.250 s

Find:

Magnitude of the average induced emf

Computation:

E = L(di/dt)

E = 7 [(1.5-0.20) / 0.250]

E = 7[5.2]

Magnitude of the average induced emf = 36.4 mv