Question

What is the coefficient of mutual inductance when the magnetic flux changes by $2 \times 10^{- 2}Wb$ and change in current is 0.01A

• A. 2 henry
• B. 3 henry
• C. $\frac{1}{2}\mspace{6mu} henry$
• D. Zero

Answer 1

Answer: (A)

2 henry

Answer 2

$\Delta\varphi = L\Delta I$ ⇒ $L = \frac{\Delta\varphi}{\Delta I} = \frac{2 \times 10^{- 2}}{0.01} = 2H$