PHYSICS · Multi-part · AP · Physics 2: Algebra-based · Electric Circuits · Electric Circuits
Problem
A filament lamp is marked 24 V, 150 mA. The lamp is connected across its rated supply for several hours.
Attempt all parts:
(a) Calculate the power consumed by the lamp when it is operated at its rated voltage and current.
(b) Determine the electrical energy consumed if the lamp is kept ON for 5 h. Express your answer both in kWh and in joules.
(c) By mistake the lamp is connected across a 12 V battery. Assuming that the resistance of the filament does not change, estimate the new current and the new power drawn by the lamp.