Which device is commonly used to maintain flow of electric current through a circuit

Fuses. An electrical fuse

What device is used to control an electric current?

the device which controls electric current is rheostat.

Which device is used to prevent the flow of excess current?

Answer: The device used to prevent the flow of excess current is fuse…….

What is used to control the flow of current in a circuit?

Answer: Resistor is the component which controls the current.