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Question: The magnitude of the magnetic field at the centre of the tightly wound 150 turn coil of radius 12 cm...

The magnitude of the magnetic field at the centre of the tightly wound 150 turn coil of radius 12 cm carrying a current of 2 A is

A

18 G

B

19.7 G

C

15.7 G

D

17.7 G

Answer

15.7 G

Explanation

Solution

Here, N = 150

I = 2A

=1.57×10−3 T=15.7×10−4 T=15.7G= 1.57 \times 10 ^ { - 3 } \mathrm {~T} = 15.7 \times 10 ^ { - 4 } \mathrm {~T} = 15.7 \mathrm { G }