Resistance of earth coil is `7Omega`. If flux associated with coil changes from 1.35 Wb to 0.79 Wb within 0.1s, the charge produced by the earth coil is

Options

A. 0.08 C
B. 0.008 C
C. 0.8 C
D. 0.04 C

Answer

A

Explanation

`q=(dphi)/(R)=(phi_(1)-phi_(2))/(R)=(1.35-0.79)/(7)`
`q=(0.56)/(7)=0.08V`