Explanation:
Resistors reduce the flow of electrons in a current. An analogy is the sudden decrease in the inner diamter of a pipe carrying water under pressure. This decrease in diameter creates an even greater pressure at the point due to high resistance to the flow of the water.
The formula for getting the resistance is;
V/I = R Where;
V = Voltage
I = Current in amp
R = Resistance
The higher the resistance, more energy in the current is wasted especially as heat energy. This concept is applied in the tungsten filament in incadescent bulbs. The filament offers high resistance to electricity until it glows releasing visible light photons.
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