A solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns per cm length. A current of 5 A falls through it. The magnetic field at the axis inside the solenoid is

Options

(a) 2 π x 10⁻³ T
(b) 2 π x 10⁻⁵ T
(c) 4 π x 10⁻² T
(d) 4 π x 10⁻³ T

Correct Answer:

2 π x 10⁻³ T

Explanation:

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