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CBSE Class 12 Electrical Appliances Marking Scheme 2026
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Frequently Asked Questions
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How does an electric heater produce heat?
An electric heater produces heat by passing electric current through a resistive element, converting electrical energy into thermal energy. -
Why is earthing important for electrical safety?
Earthing provides a safe path for excess electricity to flow into the ground, preventing electric shocks and ensuring safety during faults. -
What function do circuit breakers serve?
Circuit breakers automatically interrupt power supply during overloads or short circuits to protect wiring and prevent fires. -
How does a light bulb emit light?
A light bulb emits light when an electric current heats its filament or excites gas atoms inside it until they glow. -
What are semiconductors used for?
Semiconductors control electron flow in electronic devices like transistors and integrated circuits due to their variable conductivity properties.