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Question
Find magnetic flux density at a point on the axis of a long solenoid having 5000 tums/m when it carrying a current of 2 A.
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Solution
Here, n = 5000 turns/m, I = 2A, B = ?
We know,
B = μ0nI
B = 4π x 10- 7 x 5000 x 2
B = 4 x 3.14 x 10-7 x 1000 T
B = 12.56 x 10-3 T
B = 0.001256 T
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