Question

an electric iron has a rating of 750 W , 220 V calculate (1) current passing through it (2) its resistance, when in use

Answer 1

1. since, power P = voltage(V)* current( I)

thn, I= P/ V

therefore, I = 750/220

I = 3.40 A

2.as P= I^2 R

750= (3.40×3.40)×R

therefore R = 750/11.56

R = 64.87 ohm ..

this is the ans..