1) What is the main purpose of an amplifier? a) To stop electricity from flowing b) To make weak sounds louder c) To store energy 2) What does a diode do? a) Controls the direction of electrical current b) Makes circuits longer c) Prevents energy from being stored 3) What does a capacitor do? a) It stores energy. b) It consumes fuel. c) It transmits sound. 4) What flows through a circuit? a) Electrical current b) Sound waves c) Air 5) What is the main purpose of a circuit? a) To store energy b) To allow electricity to flow c) To consume fuel 6) What can happen if too much electricity flows through a circuit? a) The circuit will amplify the current. b) The circuit will store extra energy. c) The circuit may be damaged. 7) Why are semiconductors important in electronics? a) They stop all electricity from flowing. b) They allow controlled electricity flow. c) They are a type of fuel. 8) What is one purpose of fuel in electronic devices? a) To maintain the device’s physical condition b) To provide energy for operation c) To prevent overheating 9) What happens during the transmission of a signal? a) The signal is stored for future use. b) The signal is sent from one place to another. c) The signal is converted into fuel. 10) What can prevent a circuit from overheating? a) A capacitor b) A transistor c) A fuse

Electrical Systems 2

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