Question

How many joules of electrical energy are transferred per second by a 6 V; 0.5 A lamp?

(a) 30 J/s
(b) 12 J/s
(c) 0.83 J/s
(d) 3 J/s

Answer 1

(d) 3 J / s
Electrical energy transferred per second, E = V x I x t = $6\mathrm{V}\times 0.5\mathrm{A}\times 1\mathrm{s}$ = 3 J/s