ABSTRACT

The current in a circuit is 4.8 A when the voltage is 240 V. Calculate the power.

P = U×I = 240×4.8

1152W

Calculate the current flowing when a 2 kW heater is connected to a 230 V supply.

P = U×I 2000 = 230×I

∴ I = 2000 230

= 8.7A

The current in a certain resistor is 15 A and the power absorbed is 200W. Find the

voltage drop across the resistor.