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Ohm’s Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit as shown below. By knowing any two values of the Voltage, Current or Resistance quantities we can use Ohms Law to find the third missing value.
Learn the Power Formula. We’ve seen the formula for determining the power in an electric circuit: by multiplying the voltage in “volts” by the current in “amps” we arrive at an answer in “watts.” Let’s apply this to a circuit example:
The power formula can be rewritten using Ohm’s law as P =I 2 R or P = V 2 /R, where V is the potential difference, I is the electric current, R is the resistance, and P is the electric power.
Watts Law Definition: Watts Law is defined as the relationship between power, voltage, and current in an electrical circuit. Watts Law Formula: The formula for Watts Law includes power equals voltage multiplied by current, voltage equals power divided by current, and current equals power divided by voltage.
Electric power is the rate of transfer of electrical energy within a circuit. Its SI unit is the watt, the general unit of power, defined as one joule per second. Standard prefixes apply to watts as with other SI units: thousands, millions and billions of watts are called kilowatts, megawatts and gigawatts respectively.
Electric power is the rate at which electrical energy is transferred. The formula is Power = Current × Voltage: Power (P) is measured in Watts (W), Current (I) is measured in Amps (A), and Voltage (V) is measured in Volts (V). It takes both Current and Voltage to create Power!
Our Ohm's law calculator is a neat little tool to help you find the relationships between voltage, current and resistance across a given conductor. The Ohm's law formula and voltage formula are mainly used in electrical engineering and electronics.