electrons carry energy from a battery to a lightbulb.

What happens to the electrons when they reach the lightbulb?
The electrons are emitted as light.
The electrons stay in the lightbulb.
Fewer electrons leave the bulb than enter it.
The electrons are used up.
None of the above.

Question

electrons carry energy from a battery to a lightbulb.

What happens to the electrons when they reach the lightbulb?
	 The electrons are emitted as light.
	 The electrons stay in the lightbulb.
	 Fewer electrons leave the bulb than enter it.
	 The electrons are used up.
	 None of the above.

anonymous · Answer

The electrons stay in the wires including the light bulb filament.
Their motion due to the voltage causes heating of the filament, thus the glow. Fluorescent lights work differently, but again, the electrons stay in the system.

anonymous · Answer

I thought it was none of the above

anonymous · Answer

Well, electrons are present throughout the system, including in the filament of the bulb. Their motion causes heating, giving light. The ones that leave the bulb to the rest of the circuit are replaced by others. How do you interpret that? They are circulating in the circuit. One could argue for the second or the fifth choice, I guess.

anonymous · Answer

"What happens when they reach the light bulb?" They pass through it. So, fifth choice might be best. Some ambiguity.

anonymous · Answer

okay thank you very much

anonymous · Answer

You are very welcome. Good that you kept asking until it became clearer.

anonymous · Answer

thank you! =D