First slide

Magnetic flux and induced emf

Question

A wire is sliding as shown in figure. The angle between the acceleration and the velocity of the wire is

Easy

A

$30^{\circ}$
B

$40^{\circ}$
C

$120^{\circ}$
D

$90^{\circ}$

Solution

Due to induced emf in rod, current will flow in upward direction of rod. Due to this, magnetic force acts perpendicular to rod as shown in figure.
$∴ θ = 90^{\circ} + 30^{\circ} = 120^{\circ}$

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