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Applications

A buzzer is used in:
Alarms: Buzzers are often used in alarm systems to alert people when there’s a problem, like a
security breach or smoke detection.

Doorbells: Some doorbells use buzzers to make a sound when someone presses the button,
letting you know that a visitor has arrived.

exercise

A. Tick ( ) the correct option.

1. Which component lights up when electricity flows through it?
i) Resistor ii) Capacitor

iii) LED iv) Transistor

2. What is a common power source for small electronic devices?
i) Solar panel ii) Wind turbine

iii) Battery iv) All of these

3. What does a microcontroller do in a robot?
i) Moves the robot

ii) Processes information and controls actions

iii) Provides power

iv) Measures distance
4. Which of the following is NOT a type of sensor used in robotics?

i) Light sensor ii) Temperature sensor

iii) Power supply iv) Motion sensor
5. What is the role of a switch in a circuit?

i) To increase voltage ii) To control the flow of current

iii) To store energy iv) To measure resistance

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