Question

a potential difference of 220v is applied across a resistance of 440 ohms in an electric appliance calculate the current draw and the heat energy produced in an 20 seconds​

Answer 1

Explanation:

according to ohms law

V = IR

I = V/R

I = 220/440

I = 1/2 A

ENERGY = VIT

E = 220× O.5 × 20

E = 2200 j