When electric charges move in a wire, we say that an electric current flows in the wire. It's like the way a current of water flows in a river.
For an electric current to flow, we need two things:
Something to make the electricity flow, such as a battery or power pack
A complete path for the current to flow in. This is called an electric circuit.
Electric circuits
An electric current will not flow if we do not have a power source (a cell, battery or power pack). It also won't flow if the circuit is not complete. One end of the power source must be joined to the other end by the wires and components of the circuit.
The simplest complete circuit is a piece of wire from one end of a battery to the other. An electric current can flow in the wire from one end of the battery to the other, but nothing useful happens. The wire just gets hot and the battery goes flat.
Answers & Comments
Answer:
Electric current
When electric charges move in a wire, we say that an electric current flows in the wire. It's like the way a current of water flows in a river.
For an electric current to flow, we need two things:
Something to make the electricity flow, such as a battery or power pack
A complete path for the current to flow in. This is called an electric circuit.
Electric circuits
An electric current will not flow if we do not have a power source (a cell, battery or power pack). It also won't flow if the circuit is not complete. One end of the power source must be joined to the other end by the wires and components of the circuit.
The simplest complete circuit is a piece of wire from one end of a battery to the other. An electric current can flow in the wire from one end of the battery to the other, but nothing useful happens. The wire just gets hot and the battery goes flat.
Explanation:
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