When a 12-V battery powers a single 6-ohm lamp,
A)2 joules flow in the lamp each second.
B)6 joules flow in the lamp each second.
C)12 joules flow in the lamp each second.
D)none of the above

Question

Quizplus · Accepted Answer

The power (in joules per second) is calculated using the formula P = V^2/R. For a 12-V battery and a 6-ohm lamp, P = 12^2 / 6 = 24 watts, meaning 24 joules flow in the lamp each second.

When a 12-V Battery Powers a Single 6-Ohm Lamp