First slide

Magnetic flux and induced emf

Question

The magnetic induction in the region between the pole faces of an electromagnet is 0.7 weber/m². The induced e.m.f. in a straight conductor 10 cm long, perpendicular to B and moving perpendicular both to magnetic induction and its own length with a velocity 2 m/sec is

Moderate

A

0.08 V
B

0.14 V
C

0.35 V
D

0.07 V

Solution

$e = Bvl \Rightarrow e = 0 .7 \times 2 \times (10 \times 10^{- 2}) = 0 .14 V$

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