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.
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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, ...
The principle of a fuse is based on the thermal effect of electricity. A fuse wire melts due to the heat generated by an excessive current, thereby breaking the circuit and preventing damage. This thermal effect ensures that the fuse ...
The potential difference between the ends of a conductor is proportional to the current flowing through it. This relationship is defined by Ohm’s law, which states that the voltage across a conductor (potential difference) is directly proportional to the current ...
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 ...