Q.

The perfect formula used for calculating induced e.m.f in a rod moving in a uniform magnetic field is (where terms have their usual meaning)

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a

e=B→ . (l→ × v→)

b

e=B→ . (l→ . v→)

c

e=B→ × (l→ . v→)

d

e=B→ × (l→ × v→)

answer is A.

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Detailed Solution

induced emf is a scalar quantityhence it is a scalar triple product of magneticfield strength(B),length of conductor(l)and velocity of conductor(v)e=B→.(l→×v→)
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