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0. The two ends of a horizontal conducting rod of length l are joined to a voltmeter. The whole arrangement moves with a horizontal velocity v, the direction of motion being perpendicular to the rod. The vertical component of earth's magnetic field is B. The voltmeter reading is (NTSE Andhra Pradesh, Stage-I, 2016-17)
Blv only if the rod moves eastward
Blv only if the rod moves westward
Blv only if the rod moves in any direction
Zero
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