Two circular loops, A and B

PHYSICS · Multi-part · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

Two circular loops, A and B, are made of the same wire and lie in the same plane with their centres coinciding. Loop A has radius

12\,\text{cm}

and carries a current of

4\,\text{A}

. Loop B has three turns, each of radius

6\,\text{cm}

, and carries a current of

2\,\text{A}

. (i) Calculate the magnetic field produced at the common centre by loop A. (ii) Calculate the magnetic field produced at the common centre by loop B. (iii) Which loop produces the stronger magnetic field at the centre? Find the ratio of their magnetic fields.

Related theory

Fields due to Currents
Biot-Savart law
Magnetic field on axis of circular loop
Moving Charges and Magnetism

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