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what is formula of ohms law. The SI unit of resistance is ohms and is denoted by O. This law is one of the most basic laws of electricity.
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A SIMPLE explanation of Watts Law. Find the current flowing through an unknown resistor which dissipates 20 watts power while dropping 10 volts across it. Voltage is a difference in the electric potential between two points in a circuit.
Here is another example of current calculation through a 47 ohms resistor.
However when we calculate for power we can expand our equations to R V22 and R PI2. V is the voltage drop of the resistor measured in Volts V. The voltage formula is not dissimilar to Ohms Law. Ohms law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
