First slide

Magnetic flux and induced emf

Question

A coil having an area 2m² is placed in a magnetic field which changes from 1Wb/m² to 4Wb/m² in a interval of 2 second. The e.m.f. induced in the coil will be

Moderate

A

4 V
B

3 V
C

1.5 V
D

2 V

Solution

$| e | = A \cdot \frac{ΔB}{Δt} = 2 \times \frac{(4 - 1)}{2} = 3 V$

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