Question

Magnetic flux in a circuit containing a coil of resistance $2\Omega$ change from 2 wb to 10 wb in 0.2s. The charge passed through the coil in this time is

• A. 0.8 C
• B. 1.0 C
• C. 5 C
• D. 40 C

Answer 1

The correct option is D 40 C

The amount of charge passing through the coil is given by
$q=+\frac{d\varphi }{R}=\frac{10-2}{2}=\frac{8}{0.2}=40C$