Question

In a pair of adjacent coils, for a change of current in one of the coils from 0 A to 10 A in 0.25 s, the magnetic flux in the adjacent coil changes by 15 Wb. The mutual inductance of the coils is ________.
Fill in the blank with the correct answer from the options given below

• A. 120 H
• B. 12 H
• C. 1.5 H
• D. 0.75 H

Answer 1

Answer: (C)

1.5 H

Answer 2

The mutual inductance M is given by $M=\frac{ \bigtriangleup \Phi}{\bigtriangledown I}$ Substituting the values, $M=\frac{15}{10}=1.5$ H.