Electric circuits are used in various situations and appliances to facilitate the flow of electric current. Here are two examples:
Lighting System: Electric circuits are extensively used in lighting systems. When you turn on a light switch, it completes a circuit, allowing electricity to flow from the power source (such as a battery or electrical grid) to the light fixture. The circuit includes wires, switches, and possibly a fuse or circuit breaker for safety. The electric current passes through the circuit and energizes the light bulb, producing illumination.
Refrigerator: Refrigerators rely on electric circuits for their operation. The circuit in a refrigerator typically includes a compressor, thermostat, fan, and various sensors. When you plug in the refrigerator, the electric current flows through the circuit, powering the compressor. The compressor compresses the refrigerant, causing it to release heat and cool down the interior of the refrigerator. The thermostat regulates the temperature, and the fan circulates the cold air. The electric circuit controls and coordinates these components to maintain the desired temperature and keep your food fresh.
These are just two examples, but electric circuits are used in countless other appliances and devices, ranging from televisions and computers to washing machines and electric vehicles. They provide the necessary pathways for electricity to power and control the functions of these devices.