A rectangular loop of wire shown below is coplanar with a long wi… - Vidyadip

MCQ

A rectangular loop of wire shown below is coplanar with a long wire carrying current $I$. The loop is pulled to the right a s indicated. What are the directions of the induced current in the loop and the magnetic forces on the left and the right sides of the loop?

	Induced current	Force on left side	Force on right side
$a.$	Counter clockwise	To the left	To the right
$b.$	clockwise	To the left	To the right
$c.$	Counter clockwise	To the right	To the left
$d.$	clockwise	To the right	To the left

A
$a.$
✓
$b.$
C
$c.$
D
$d.$

✓

Answer

Correct option: B.

$b.$

b
(b)

The loop $A B C D$ is moving from region of high flux to low flux in region of a downward magnetic field.

Following Lenz's law induced emf must be directed to increase the flux. Hence, direction of induced emf is clockwise in the loop.

Hence, current in wire and $A D$ length are parallel. So, there is attraction in wire and $A D$ length.

Similarly, there is repulsion in $B C$ and wire.

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