A device used to open and close an electric circuit is a(n)
a. light bulb.
b. energy source.
c. switch.
d. resistor.
Please select the best answer from the choices provided
The best answer from among the choices provided is 'c' ... the switch.
Other devices that can perform the same function include circuit breakers, solid state switches, switching transistors, silicon controlled rectifiers, and triacs.
