When a light switch is turned on in a dc circuit,the average speed of electrons in the lamp is
A)the speed of sound waves in metal.
B)the speed of light.
C)1000 cm/s.
D)less than 1 cm/s.
E)dependent on how quickly each electron bumps into the next electron.

Question

Quizplus · Accepted Answer

The average speed of electrons in a DC circuit is relatively slow, typically less than 1 cm/s. This is because the electric field causes only a drift velocity of the electrons, which is much slower than their thermal velocity. Therefore, the answer is D) less than 1 cm/s.

When a Light Switch Is Turned on in a Dc