Two incandescent lamps are designed to operate at

PHYSICS · Multi-part · AP · Physics 2: Algebra-based · Electric Circuits · Electric Circuits

Problem

230\,\text{V}

. Lamp A is rated

40\,\text{W}

while Lamp B is rated

100\,\text{W}

. (i) Determine the current drawn by each lamp when connected to a

230\,\text{V}

mains supply. (ii) Which lamp has a thicker filament? Give a reason for your answer based on your calculations. (iii) If both lamps glow for

3\,\text{h}

, compare the electrical energy consumed by each.