Physics

Problem

Two concentric, coplanar circular loops lie in the same plane. Loop

B

has radius

10\,\text{cm}

and carries a clockwise current that is increasing at the rate

2\,\text{A\,s}^{-1}

. Loop

A

of radius

5\,\text{cm}

is centred on the same axis. a. (i) State the direction of the induced current in loop

A

. b. (ii) Will the magnetic force between loops

A

and

B

be attractive or repulsive? Give reason.