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Magnetisation

A straight li...

Question

A straight line conductor of length $0.4 m$ is moved with a speed of $7 m / s$ perpendicular to a magnetic filed of intensity $0.9 W b / m^{2}$ . The induced e.m.f. across the conductor is

A

5.04 V

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B

1.26 V

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C

2.52 V

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D

25.2 V

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Solution

The correct option is C $2.52 V$

Magnetic field B = 0.9
Length = 0.4 m
speed = 7 m/s
Induced emf = B x l x v
= 0.9 x 0.4 x 7
= 2.52 V

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