You obtain a 100-W light bulb and a 50-W light bulb. Instead of connecting them in the normal way, you devise a circuit that places them in series across normal household voltage. If each one is
An incandescent bulb of fixed resistance, which statement about these bulbs is correct?
A) The 50-W bulb glows more brightly than the 100-W bulb.
B) Both bulbs glow with the same brightness, but more than their normal brightness.
C) The 100-W bulb glows brighter than the 50-W bulb.
D) Both bulbs glow with the same brightness, but less than their normal brightness.

Question

Quizplus · Accepted Answer

When bulbs are connected in series, the same current flows through both. The bulb with the higher resistance (the 50-W bulb, since power is inversely proportional to resistance for a given voltage) dissipates more power in this configuration, causing it to glow more brightly than the 100-W bulb.

You Obtain a 100-W Light Bulb and a 50-W Light