Question

The magnetic field in a coil of 100 turns and 40 square cm area is increased from 1 Tesla to 6 Tesla in 2 second. The magnetic field is perpendicular to the coil. The e.m.f. generated in it is

• A. $10^{4}V$
• B. 1.2 V
• C. 1.0 V
• D. $10^{- 2}V$

Answer 1

Answer: (C)

1.0 V

Answer 2

$e = - N\left( \frac{\Delta B}{\Delta t} \right).A\cos\theta = - 100 \times \frac{(6 - 1)}{2} \times (40 \times 10^{- 4})\cos 0$

$\Rightarrow |e| = 1\mspace{6mu} V$