A long solenoid of radius 1 mm has 100 turns per mm . If 1 A current flows in the solenoid, the magnetic field strength at the centre of the solenoid is:

Question

A long solenoid of radius 1 mm has 100 turns per mm . If 1 A current flows in the solenoid, the magnetic field strength at the centre of the solenoid is:, 12 . 56 × 10 - 2 T, 12 . 56 × 10 - 4 T, 6 . 28 × 10 - 4 T, 6 . 28 × 10 - 2 T

MARKS App · Accepted Answer

Radius = 1 mm N = 100 turns per mm Current = 1 A Magnetic field strength at the centre of the solenoid is, B = μ 0 n i = 4 π × 10 - 7 × 100 × 10 3 × 1 ⇒ B = 12 . 56 × 10 - 2 T

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