First slide

Induced Electric Field and Magnetic field

Question

As a result of change in the magnetic flux linked to the closed loop shown in the figure, an emf V volt is induced in the loop. The work done (joules) in taking a charge Q coulomb once along the loop is

Moderate

A

QV
B

zero
C

2QV
D

$\frac{QV}{2}$

Solution

Induced emf = $\frac{work done in taking a charge Q once along the loop}{charge Q}$
$i.e., V = \frac{W}{Q}$
$\Rightarrow W = VQ$

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