The dry cell is a primary cell. Primary cells are designed for single-use applications and cannot be recharged once depleted. They are commonly used in everyday items such as flashlights, remote controls, and portable electronics due to their convenience and ...
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The coating of a zinc layer on iron is called galvanization. This process involves applying a protective zinc coating to iron or steel to prevent rusting and corrosion. Galvanization is widely used in various industries to extend the lifespan of ...
The principle of a fuse is based on the thermal effect of electricity. A fuse wire melts due to the heat generated by an excessive current, thereby breaking the circuit and preventing damage. This thermal effect ensures that the fuse ...
Fuse wire is made of an alloy of tin and lead. This combination is selected because the alloy has a low melting point, allowing the fuse to melt and break the circuit quickly when excessive current flows, thus protecting electrical ...
For normal applications, an electric fuse wire must have a low melting point alloy and be thin with less length. These properties ensure that the fuse wire melts quickly when excessive current flows, breaking the circuit effectively and protecting electrical ...
The filament of an electric bulb is made of tungsten. Tungsten is chosen for its high melting point and ability to withstand intense heat without melting, making it ideal for producing light when an electric current passes through it.
The loud sound when a bulb is broken occurs because air enters rapidly into the vacuum inside the bulb. The sudden influx of air into the vacuum creates a pressure difference, causing the loud noise as the vacuum is disrupted.
Air is completely removed from an electric bulb to create a vacuum or fill it with an inert gas, which prevents the tungsten filament from reacting with oxygen. This helps to prolong the life of the bulb.
The electrical energy in the tube is almost completely converted into light energy. Fluorescent tubes are preferred over electric bulbs because they are more efficient at converting electrical energy into visible light, reducing energy wastage and providing brighter illumination.
The SI unit of specific resistance, also known as resistivity, is the ohm-meter (symbol: Ω·m). Resistivity quantifies the intrinsic resistance of a material to the flow of electric current. It is a characteristic property that depends on the material’s composition ...