Combining the elements of voltage, current, and resistance, Ohm developed the formula: Where V = Voltage in volts I = Current in amps R = Resistance in ohms This is called Ohm's law. Let's say, for example, that we have a circuit with the potential of 1 volt, a current of 1 amp...
Second Version of the (current) formula: I = V / R If a current I flows through a resistor, and there is a voltage V across the resistor. R can be calculated. Third Version of the (resistance) formula: R = V / I All of these variations of the so called "Ohm's Law" are mathe...
V represents the voltage across the conductor in volts (V). I represent the current flowing through the conductor in amperes (A). R represents the resistance of the conductor in ohms (Ω). Rearranging the resistance formula, we can solve for resistance: R = V / I The resistance formula ...
Thus, the resistance R of the circuit is equal to the voltage V across the circuit divided by the current I flowing through the circuit. How to Calculate the Resistance Using WattsYou can also calculate the resistance in a circuit using Watt’s Law power formula. If you know the power in...
Power Formula 1– Electrical power equation:PowerP=I×V=R×I2=V2⁄R where powerPis in watts, voltageVis in volts and currentIis in amperes (DC). If there is AC, look also at the power factorPF= cosφandφ= power factor angle ...
be derived from Ohm’s Law. As theelectrical resistanceof a material depends on the voltage across the material and the current flowing through the material, the formula for this can be given as the voltage drop across the material per unit ampere current flowing through it. i.e. R = V/...
(I-V) equation suitable for the hand-calculation of ballistic nano conductors is derived from Landauer's formulation. A voltage and temperature dependent resistance expression is also obtained. It is shown that the presented algebraic I-V expression and the original Landauer's formula give the ...
Divide the voltage by the current to get your resistance. This formula, known as Ohm's Law, is a fundamental law of electronics and states that the voltage is equal to the resistance multiplied by the current. For example, a 120 volt circuit that generates 10 amperes of current would have...
Read about Ohm’s Law - How Voltage, Current, and Resistance Relate (Ohm's Law) in our free Electronics Textbook
Calculate the resistance, in Ohms, by dividing the voltage by the current. Ohms law states that voltage = current x resistance, so by rearranging the formula resistance = voltage / current. Using the example in Step 1, with a voltage of 50 volts and a current of 2 amps, the resistance ...