A long solenoid is fabricated by closely winding a wire of diameter `0.5 mm`
Channel: Doubtnut
Date: 2020-04-26

A long solenoid is fabricated by closely winding a wire of diameter `0.5 mm` over a cylindrical nonmagnetic frames so that the successive turns nearly touch each other.What would be the magnetic field `B` at the centre of the solenoid if it carries a current of `2.5 A`?