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Use (or make) an electromagnet as a control. Like the solonoid on your car's starter or power door locks Low voltage types available at Radio shack or the like...
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∙ 15y ago
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Electrical device activated by a current that opens or closes another circuit?
An electrical device activated by a current that opens or closes another circuit is called a relay. A contactor also falls into this category.
It closes the electrical circuit.?
The definition of a switch is a device that closes and opens an electrical circuit.
What does an switch do in a circuit?
opens and closes the circuit
What is the part of the circuit that closes or opens the circuit?
The switch.
What a switch does in an electrical circuit?
opens and closes the circuit
What is a part of s circuit that opens and closes the circuit?
A switch.
How an electrical relay works?
A relay will have a control circuit and a function circuitcould be the same feed line. One set of terminals (Hot and Load) can be activated at all times, but will not function until the control circuit is closed. The control circuit has a Hot and a Ground--when activated either by supply hot or ground by switch. The internal coil closes allowing the function circuit to operate. The purpose of this relay is to reduce the spike to the alternator. It takes less current (voltage) to close the coil on the relay than it would to operate the accessory that it controls
What happens when a circuit closes?
when a circuit is closed, electricity can move though it.
What part in an electric circuit opens and closes the circuit?
A switch, switching transistor, or circuit breaker usually does.
What job does a switch do in a circuit?
It opens and closes a circuit and it makes the bulb turn off and on and it completes a circuit when it is closed.
The part of a circuit that closes or opens a circuit?
Generally a circuit breaker (like a light switch) But I guess you could use a resistor of the right resistance If you are talking about the circuit breaker there is an electromagnetic coil in it which get magnetized on a specific amount of current and breaks the circuit
What is a photoswitch?
It is a switch that is activated by light levels. They are used in dusk to dawn sensors. Light in the daytime, through the switch, holdsthe circuit open. At night, with no light source on the sensor cell, the switch closes and is usedto bring the night light on.
