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A voltage regulator. Examples are the 78dd series of regulators where dd is the voltage, e.g. 7805, 7812. These work with a positive rail, the 79dd regulators work with a negative rail.

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Electricity will flow only if an electrical circuit is?

if an electric circuit has potential difference. Electricity will flow only if an electrical circuit is closed.


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An electrical circuit must be complete i.e it must form a closed loop,for it to work. Current only flow if the circuit is complete. A complete circuit is one that consist of a Voltage source, a consumer like a bulb and conductors. The conductor then connects the consumer and the voltage source together forming a closed loop.


How circuit work?

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Is current constant through a circuit?

Yes, in a closed circuit, the current is constant and flows continuously through the circuit.


When does the electric current flow?

An electric current will flow if there is a voltage, and a conducting path (usually a closed circuit is required).An electric current will flow if there is a voltage, and a conducting path (usually a closed circuit is required).An electric current will flow if there is a voltage, and a conducting path (usually a closed circuit is required).An electric current will flow if there is a voltage, and a conducting path (usually a closed circuit is required).


What happens to an electric current when a circuit is closed?

When a circuit is closed, meaning there is a complete path for the electric current to flow, the current will flow from the positive terminal of the voltage source through the circuit components and back to the negative terminal. This flow of current allows electrical energy to be transferred and work to be done in the circuit.


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