Several questions about the direction of induced current. In all the parts of th

Question

Several questions about the direction of induced current. In all the parts of this question, the same initial situation holds, shown in the figure. In the heavy loop there is a clockwise current. Something about the arrangement is changing, and a current may or may not be induced in the lighter loop as a result. For each part, specify whether the induced current runs clockwise, counterclockwise, or if no current is induced at all. The current in the heavy loop is increased, The heavy loop is pulled away to the left. The heavy loop is rotated: its top side is lifted and the bottom is sunk so that the loop lies in a plane perpendicular to the page, and the current is coming out of the page at the left, running over the top from left to right, and diving into the page on the right. The heavy loop is cut so the current stops flowing. The heavy loop and its current is unchanged, but the lighter loop is crushed so it becomes smaller in diameter.

Explanation / Answer

here,

by Lenz's law

If an induced current flows, its direction is always such that it will oppose the change which produced it.

(a)

when current in heavy loop is incresed

the induced current in the loop is counterclock wise

(b)

as the heavy loop is pulled away to the left,

the flux through the light loop changes

and the current induced is clockwise

(c)

the change in magnetic
flux is occured,

as the flux is decreasing

so the current induced is clockwise

(d)

as the current stops flowing

the change in flux occured

the current induced is in counterclockwie direction

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