A fuse protects an electric circuit by which of the following?

Correct option is A

The correct answer is (A) Overloading

Explanation:

• A fuse is a safety device used in electrical circuits to protect the circuit and appliances from damage caused by overloading or short circuits.

• It consists of a piece of wire made of a material with a low melting point (like an alloy of tin and lead).

• When a high current flows through the circuit due to an overload, the wire heats up due to the heating effect of electric current.

• The fuse wire melts and breaks the circuit, thereby stopping the flow of excessive current.

• According to NCERT Science (Class 7 & 10), this prevents potential fire hazards and the burning of expensive electrical components.

Information Booster:

• Overloading occurs when too many electrical appliances are connected to a single socket, drawing more current than the wires can handle.

• Nowadays, MCBs (Miniature Circuit Breakers) are increasingly used instead of fuses because they automatically switch off when the current exceeds the safety limit and can be simply switched back on without needing replacement.

• The maximum current that can safely flow through a fuse is called its rating (e.g., 5A or 15A).

Additional Knowledge:Transforming one form of energy into another (Option B) * This describes the function of transducers or general appliances, not a protection mechanism.

• For example, an electric bulb transforms electrical energy into light and heat energy.

Current sport (Option C) * This is an incorrect and irrelevant term in the context of electrical engineering or physics. It does not refer to any recognized electrical phenomenon.

Current uptake (Option D) * This term generally refers to the consumption or drawing of current by a device.

• While a fuse monitors current, "current uptake" is the process of using power, not the mechanism that protects the circuit.