Switch, It allows or stops the flow of electricity as desired., Resistor, It reduces the current., Battery, It provides the power source., Ammeter, It measures the current flowing through a part of the circuit., Voltmeter, It measures the electromotive force between two points in the circuit., Fuse, It opens the circuit if too much current flows through it., Wire, It carries electrons around the circuit and connects parts., Bulb, It converts electrical energy into light.

2. A simple circuit

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