Ohm's LawOhm's law states the relationship between voltage, current, and resistance in a circuit.
Ohm's law states that the amount of voltage is equal to the resistance times the current. Ohm's law: V = IR Voltage is the amount of potential energy between two points on a circuit. Resistance is the measure of how much a material reduces the current flowing through. Current is the flow of electric charge. Each one of these is dependent on the other. When the resistance is lowered, there is more current. This means that there is more friction, which means there is more heat. Ultimately, more heat creates fire. |
Ohm's law shows another reason why lightning can cause fires. When lightning strikes a house, the electrons may use wiring to flow to the ground. This is a problem as there is an excessive amount of voltage in lightning, which may be over 100 million volts. A normal AA battery(the kind in remote controls) has only 1.5 volts. Again, lightning rods can be used to prevent this problem. Since lighting travels in the fastest path to the ground, a lighting rod works by conducting the electricity from lightning to the ground.
Ohm's Law is closely related to Conductors and Insulators.