Two concentric circular coils lie in the same plane

PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

Two concentric circular coils lie in the same plane. Coil

P

has

20

turns, radius

10\,\text{cm}

and carries a current of

4\,\text{A}

clockwise. Coil

Q

has

10

turns, radius

5\,\text{cm}

and carries a current of

6\,\text{A}

anticlockwise. Determine the magnitude and direction of the net magnetic dipole moment of the system. (Use

\pi = 3.14

.) (a)

2.04\,\text{A\,m}^{2}

out of the page (b)

0.65\,\text{A\,m}^{2}

into the page (c)

2.04\,\text{A\,m}^{2}

into the page (d)

2.98\,\text{A\,m}^{2}

out of the page