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Physics-

General

Easy

Question

Two circular coils $A$ and $B$ are facing each other as shown in figure. When the current $i$ through $A$ is altered

There will be repulsion between $A$ and $B$ if $i$ is increased
There will be attraction between $A$ and $B$ if $i$ is increased
There will be neither attraction nor repulsion when $i$ is changed
Attraction or repulsion between $A$ and $B$ depends on the direction of current. It does not depend whether the current is increased or decreased

The correct answer is: There will be repulsion between $A$ and $B$ if $i$ is increased

With rise in current in coil $A$ flux through $B$ increases. According to Lenz’s law repulsion occurs between $A$ and $B$

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