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15/09/2020 5:47 pm
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A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is : (μ0 = 4 × 10–7 T m A–1)
(1) 3.14 × 10–4 T
(2) 6.28 × 10–5 T
(3) 3.14 × 10–5 T
(4) 6.28 × 10–4 T
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15/09/2020 5:49 pm
Correct answer: (4) 6.28 × 10–4T