Magnetic field due to 0.1A current flowing through a circul…

Physics Moving Charge and Magnetism Magnetic Field Due to a Circular Loop MCQ (Single Correct)

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

0.2 T

2 ×10 –4 T

6.28 ×10 –4 T

9.8 ×10 –4 T

Text Solution

Verified by Experts

The correct answer is:

At the center of circular coil carrying current, the magnetic field is,

B =

where N = number of turns in the coil

i = current flowing

r = radius of the coil

Given, N = 1000, i = 0.1A, r = 0.1m

Substituting the values, we have

B =

= 2π × 10 –4 = 6.28 × 10 –4 tesla

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