Kilowatt hour (kWh) is a unit of electrical energy. It measures the amount of energy consumed or produced over time. One kilowatt hour represents the energy used by a device with a power rating of one kilowatt operating for one ...
Tiwari Academy Discussion Latest Questions
Benjamin Franklin invented the lightning conductor in the 18th century. His invention provided a method to protect buildings and structures from lightning damage by safely directing the electrical discharge into the ground.
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 algebraic sum of the currents meeting at a point in a circuit is zero. According to Kirchhoff’s current law (KCL), which states that the total current entering a junction (or node) in a circuit is equal to the total ...
Earth is used in electrical equipment primarily for safety. It provides a path to dissipate fault currents safely into the ground, preventing electric shocks, fires, and damage to equipment. This grounding ensures that in case of a fault, such as ...
Copper is mainly used for conducting electricity because its electrical resistance is low. This low resistance allows for efficient transmission of electrical current with minimal energy loss, making copper an ideal material for electrical wiring and components in various applications.
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 law describing the force between two stationary charges, stating it is directly proportional to the product of their charges and inversely proportional to the square of the distance between them, is known as Coulomb’s law. This fundamental principle in ...
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 ...
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.