An electric lamp of 100 watts used for 10 hours in a day consumes 1 kilowatt hour (kWh) of energy, which is equivalent to 1 unit of energy. This is calculated by converting the total watt-hours into kilowatt-hours.
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The non-metal that is not a poor conductor of electricity is selenium. Unlike other non-metals such as sulfur, bromine, and phosphorus, selenium has the ability to conduct electricity, especially in its crystalline form. This property makes selenium useful in various ...
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.
Substances which do not have free electrons in their normal state, but can obtain free electrons under special conditions like high temperature or addition of impurities, are called semiconducting substances. These materials are crucial in modern electronics, as their conductivity ...
Fiber optic used in communication works only on the principle of total internal reflection of light. This principle allows light to propagate through the fiber by continuously reflecting off the fiber’s walls, ensuring minimal signal loss over long distances.