1. After tuming off the switch of a circuit, the lighted bulb stops glowing. Why do you think this
happens?
A. The close circuit blocked the current to flow freely.
B. Turning off the switch made the circuit open and break the flow of current.
C. The voltage of the battery is enough to supply the needed current to make the load work.
D. The connected wires in a circuit closed and the flow of current made the load failed to work.
Share
Answer:
B. Turning off the switch made the circuit open and break the flow of current.