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 ...
Category: Class 10 Science
NCERT Solutions for Class 10 Science and important questions for CBSE class 10 for session 2020-2021
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Arsenic is not a semiconductor. Germanium, silicon, and selenium are all semiconductors used extensively in electronics for their ability to conduct electricity under certain conditions, while arsenic, although used as a doping agent in semiconductors, is not a semiconductor itself.
The characteristic of a superconductor is zero permittivity. Superconductors exhibit the unique property of having no electrical resistance when cooled below a certain critical temperature, allowing electric current to flow without any energy loss. This phenomenon is utilized in various ...
Light travels in optical fibers due to total internal reflection. This phenomenon occurs when light strikes the boundary of the fiber core at an angle greater than the critical angle, causing it to reflect back into the core rather than ...
A magnifying lens is a convex lens that is thicker in the middle and thinner at the edges. It is used to enlarge the apparent size of objects when viewed through it by bending light rays inward, causing them to ...