Question

A lamp is connected to a 230 V mains supply. A current of 4 A flows through the lamp for 30 seconds.

Answer 1

The energy dissipated is 27600 J.

Step-by-step explanation:

Voltage, V = 230 V

Current, I = 4 A

time, t = 30 s

The energy is given by

E = V I t

E = 230 x 4 x 30

E = 27600 J