First slide

Magnetic field due to a current carrying circular ring

Question

Magnetic field due to 0.1 A current flowing through a circular coil of radius 0.1 m and 1000 turns at the centre of the coil is

Easy

A

$2 \times 10^{- 1} T$
B

$4.31 \times 10^{- 2} T$
C

$6.28 \times 10^{- 4} T$
D

$9.81 \times 10^{- 4} T$

Solution

$B = \frac{μ_{0} Ni}{2 r} = \frac{4 π \times 10^{- 7} \times 1000 \times 0 .1}{2 \times 0 .1} = 6 .28 \times 10^{- 4} T$

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