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.
The decibel unit is used for the intensity of sound. It quantifies the level of sound intensity based on a logarithmic scale, where each increase of 10 decibels represents a tenfold increase in intensity. This unit helps measure and compare ...
Isomers are molecules with the same chemical formula but different structures. Structural isomers differ in arrangement, geometric isomers have different spatial arrangements, and stereoisomers have the same connectivity but differ in spatial arrangement.
Asexual reproduction involves the creation of offspring without the union of gametes. It results in genetically identical or nearly identical offspring to the parent, common in plants, bacteria, and fungi.
NCERT, CBSE Class 10 Science Sample Question Paper new 2023-2024 with Solutions
2024 CBSE Class 10 Science Sample Question Paper SQP download with solutions