You remove the batteries from a working flashlight, turn both of them around as a pair, and reinsert them in the flashlight. They make good contact with the flashlight's terminals at both ends, so that there is no mechanical problem preventing the flashlight from working. If you now switch on the flashlight, it will
A) not work because only electrons can actually move through a circuit. The positively charged atomic nuclei are immobile.
B) work properly, although current will now be flowing backward through its circuit.
C) not work because the batteries can't send current backward through the flashlight's circuit.
D) not work because the light bulb can only carry electric current in one direction.

Question

Quizplus · Accepted Answer

When you reverse the batteries in a flashlight, the direction of the current through the circuit is reversed. However, most simple flashlight bulbs (incandescent bulbs) do not have a polarity, meaning they can light up regardless of the direction of the current flow. Therefore, the flashlight will still work, albeit with the current flowing in the opposite direction.

You Remove the Batteries from a Working Flashlight, Turn Both