A filament lamp is marked 24 V, 150 mA. The lamp is connected across its rated supply for several hours.
Attempt all parts:
a. (a) Calculate the power consumed by the lamp when it is operated at its rated voltage and current.
b. (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. (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.