A wire of resistance `4 Omega` is used to wind a coil of radius 7 cm. The wire has a
Channel: Doubtnut
Date: 2020-08-30

A wire of resistance `4 Omega` is used to wind a coil of radius 7 cm. The wire has a diameter of 1.4 mm and the specific resistance of its material is `2xx10^(-7) Omega m`. Find the number of turns in the coil.