This prevents an excessive amount of electricity from passing through a circuit:

This prevents an excessive amount of electricity from passing through a circuit:

• A. Fuse
• B. Extension cord
• C. Amp
• D. Ohm

Answer: (A)

To prevent excessive current from flowing, a protective device is used that actually interrupsthe circuit when the current gets too high. A fuse contains a thin metal link that melts when overloaded, which opens the circuit and stops the electricity. This sacrifice of the fuse stops overheating and reduces the risk of fire. An extension cord simply provides a path to extend reach and doesn’t automatically cut current in overloads. Amp and ohm are units—amps measure current, ohms measure resistance—so they don’t act as protective devices. So the fuse is the component that prevents too much electricity from passing through.

To prevent excessive current from flowing, a protective device is used that actually interrupsthe circuit when the current gets too high. A fuse contains a thin metal link that melts when overloaded, which opens the circuit and stops the electricity. This sacrifice of the fuse stops overheating and reduces the risk of fire. An extension cord simply provides a path to extend reach and doesn’t automatically cut current in overloads. Amp and ohm are units—amps measure current, ohms measure resistance—so they don’t act as protective devices. So the fuse is the component that prevents too much electricity from passing through.