If a 100-watt electric bulb burns for 10 hours, it consumes 1 kilowatt hour (kWh) of electricity. Since electricity is sold at the rate of Rs 5 per unit, the cost of running the bulb for 10 hours will be ...
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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 ...
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.
Lightning conductors are made of copper because it has excellent electrical conductivity and resistance to corrosion. Copper effectively channels the electrical discharge from lightning safely into the ground, protecting buildings and structures from damage.
The resistance of the filament is more than that of the wires. The filament glows because its high resistance causes it to heat up and emit light when current flows through it. In contrast, the wires have much lower resistance, ...