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Question

A conducting rod of length l falls vertically under gravity in a region of uniform magnetic field B. The field vectors are inclined at an angle θ with the horizontal as shown in figure. If the instantaneous velocity of the rod is v, the induced emf in the rod ab is

A
Blv
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B
Blvcosθ
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C
Blvsinθ
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D
Zero
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Solution

The correct option is D Zero
v is parallel to l.
Induced emf will be zero.

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