A circular metal ring is situated above a long straight wire, as shown in the fi

Question

A circular metal ring is situated above a long straight wire, as shown in the figure. The straight wire has a current flowing to the right, and the current is increasing in time at a constant rate. Which statement is true? There is no induced current in the metal ring because the current in the wire is changing at a constant rate. There is an induced current in the metal ring, flowing in a clockwise direction. There is an induced current in the metal ring, flowing in a counter-clockwise direction. None of the above

Explanation / Answer

The current flowing in the wire is changing at a constant rate so it produces a magnetic field (B) through the loop and it grows as the current grows

According to right hand thumb rule Bwire is out of page and through the loop.

Loop induces a current to make Binduced INTO PAGE inside the loop

and as the induced current always resists the increase in flux that gives CLOCKWISE direction of current

so ans is b ; there is an induced current in the metal ring, flowing in clockwise direction.

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