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. , Fuse - Used for cutting off an electrical current when there is an overload of electricity.  , LDR - Resistance changes with light level, LED - converts electrical energy to light - often different colours, Motor - converts electrical to kinetic energy, a.c. supply - supplies an alternating current, Loudspeaker - converts electrical to sound energy, Solar cell - converts light into electrical energy, Capacitor - device for storing energy, Diode - allows current to flow in one direction only, Thermistor - resistance changes with temperature, Relay - an electronic switch, Microphone - changes sound to electrical energy, NPN Transistor - type of switch, MOSFET Transistor - type of switch,

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