A difference in potential is applied across the combination of a 40-W lightbulb and a 60-W lightbulb connected in series. The 40-W bulb
A) glows more brightly than the 60-W bulb.
B) glows less brightly than the 60-W bulb.
C) glows as brightly as the 60-W bulb.
D) and the 60-W bulb do not glow at all.

Question

Quizplus · Accepted Answer

In a series circuit, the same current flows through both bulbs. The 40-W bulb has a higher resistance than the 60-W bulb, so it will dissipate more power (P = I^2R) and glow more brightly.

A Difference in Potential Is Applied Across the Combination of a 40-W