The letter “V” represents voltage.Ĭurrent is how fast the charge is flowing.
The unit of “volt” is the name of the Italian physicist Alessandro Volta who created the first chemical battery. The difference between these two points of the charge is how we measure the voltage. These two points have different charges, one is higher and the other is lower. Voltage is how much energy is between two points on a circuit. Where I is the current in amperes, V is the potential difference in volts, and R is a constant, measured in ohms, called the resistance.Ĭurrent, Voltage, and Resistance Voltage
Because there are three variables, it can be written in three ways, depending on which variable is placed on the left of the equals sign: Ohm's law says that in an electrical circuit, the current passing through a resistor is related to the voltage difference and the electrical resistance between the two sides, as long as the physical conditions and the temperature of the conductor remain constant.
