Bulb - Glows when the circuit is complete. , Voltmeter - Measures the voltage produced by a power supply. , Ammeter - Measures the flow of electrons in a circuit, which is known as current. , Resistor - It slows down the flow of electrons in a circuit. , Variable resistor - It slows down the flow of electrons in a circuit. Resistance can be changed.  , Cell - Transforms chemical energy into electrical energy. , Battery - Two or more cells in a series. , Open switch - The circuit opens. , Closed switch - It connects the components in the circuit. , Fuse - Used for cutting off an electrical current when there is an overload of electricity.  ,

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