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# Biot Savart law

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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.

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#### Solution Preview

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.

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