A heater coil is to be constructed with a nichrome wire `(rho = 1.0 xx 10^(-6) Omegam)` which can
Channel: Doubtnut
Date: 05/07/2020

A heater coil is to be constructed with a nichrome wire `(rho = 1.0 xx 10^(-6) Omegam)` which can operate at `500 W` when connected to a `250 V` supply. (a) What would be the resistance of the coul? (b) If the cross-sectional area of the wire is `0.5 mm^2`, what length of the wire will be needed? (c) If the radius of each turn is `4.0 mm`, how many turns will be there in the coil?