Question

Which of the following scenarios will cause the current to stop flowing within a circuit?

A. Insulating materials within the circuit are replaced with conducting materials.
B. A wire connected to the voltage source runs from the negative to the positive terminal.
C. The switch within the closed circuit is opened.
D. The circuit is closed.

Answer 1

The correct answer is C

Answer 2

C is correct. Only a closed circuit can carry current, opening a switch disconnects the circuit and stops current from flowing. Remember, all current flows in loops, if you can't make a loop out of it, current can't flow, and opening a switch, assuming no other paths for current exist, will completely stop the current.