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Concepts

1. Switch and Circuit Activation: You will understand how a push switch
works to open or close a circuit, controlling when the LED turns on and off.
This connects to the concept of input devices (like switches) in electronics.

2. Everyday Electronics: The activity demonstrates how simple electronics

are integrated into everyday objects like refrigerators, helping you connect
scientific principles to real world applications.

Observations

In the Refrigerator Light Circuit activity, students will observe how pressing

the switch completes the circuit and powers the LED, turning it on. When the
switch is released, the circuit breaks, and the light turns off. This activity
provides a clear understanding of how switches control circuits, linking

everyday applications like refrigerator lighting with basic electronics concepts.

Application

In a microwave, the button is used to start, stop,
or choose cooking settings, like time or power level.

The LED light shows the status of the microwave,
like when it’s cooking or finished. Together, they
make it easy to control and know what’s happening

with the microwave.

eXERCISE

A. Tick ( ) the correct option.

1. What is the primary function of a circuit?

(i) To store energy

(ii) To allow electricity to flow through components

(iii) To generate heat

(iv) To act as an insulator

Understanding Circuits and Electronics 45