# Biot Savart law

A circular loop of radius R is placed in the xy-plane, centered at the origin, as shown. A constant current I flows in the loop. Use the Biot-Savart Law to calculate the H -field along the z-axis.

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#### Solution Preview

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A circular loop of radius R is placed in the xy-plane, centered at the origin, as shown. A constant current I flows in the loop. Use the Biot-Savart Law to calculate the H -field along the z-axis.

z

dB' dB'sinÎ¸

Î¸ P

dB'cosÎ¸

Î¸

r a

Å™ I

90o Y

Idl

R

x

Solution :

Let us consider an infinitesimally small current element vector Idl of the loop as shown. Take any point P on the z axis at a ...

#### Solution Summary

The magnetic field of circular loops for Biot Savart Law. The constant current flows in the loop is determined.