A rectangular coil of dimensions 4 cm × 5 cm with number of turns 20 is placed with its plane perpendicular to a uniform magnetic field of 5 T. If it is moved with a speed of 2 m/s in the field parallel to its length, the e.m.f induced is

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zero

0.4 V

0.5 V

0.1 V

answer is C.

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Detailed Solution

Given data:

Coil dimensions = 4cm and 5 cm

Number of turns N=20

Uniform magnetic field B=5T

Speed of the coil = 2m/s

Concept used: motional emf

Detailed solution:

We know that induced EMF

$E = \overset{⇀}{B} . (\overset{⇀}{l} \times \overset{⇀}{v})$

here l and v are parallel

Therefore, induced EMF is zero

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