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2 days ago · Find out the resistance of the resistor. Measure the current through the resistor using an ammeter. Multiply the current by the resistance to get the voltage drop using Ohm's law. Ohm's Law calculator let's you explore the relationships between power, voltage, current, and resistance.
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For example, the power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A): For a circuit with 20 volts (V) and a current of 2 amps (A) the total power is 40 watts (W). Use DigiKey's Ohm's Law calculator to quickly calculate resistance, current, voltage, and power.
Enter any two known values and press "Calculate" to solve for the others. Voltage (V) Volts (V) Current (I) Resistance (R) Power (P) Watts (W) Calculate. Click "Calculate" to update the fields with orange borders. Simple to use Ohm's Law Calculator. Calculate Power, Current, Voltage or Resistance.
Jan 18, 2024 · To calculate the equivalent resistance of two resistors in parallel: Take their reciprocal values. Add these two values together. Take the reciprocal again. For example, if one resistor is 2 Ω and the other is 4 Ω, then the calculation to find the equivalent resistance is: 1 / (1/2 + 1/4) = 1 / (3/4) = 4/3 = 1.33 Ω.
- Ohm's Law
- Electrical Power
- Ohm's Law Formula Wheel
Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage. This is true for many materials, over a wide range of voltages and currents, and the resistance and conductance of electronic components made from these materials remain constant. Ohm's Law is true for circuits that contain only resisti...
Power is the rate at which electrical energy is transferred by an electric circuit per unit time typically expressed in the SI (International System of Units) unit of Watts. Power is typically produced by electric generators and supplied to businesses and homes through the electric power industry, but can also be supplied by electric batteries or o...
Below is a formula wheel for Ohm's Law relationships between P, I, V, and R. This is essentially what the calculator does, and is just a representation of the algebraic manipulation of the equations above. To use the wheel, choose the variable to solve for in the middle of the wheel, then use the relationship for the two known variables within the ...
Use our resistance calculator to calculate the resistance in ohms given voltage, current, or power. See the formulas to calculate resistance.
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How do you calculate resistance in a circuit?
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How do I Use Ohm's law calculator?
Resistance ( R) Power ( P) = Calculate. × Reset. Calculation. Ohm's law calculation formula. The current I in amps (A) is equal to the voltage V in volts (V) divided by the resistance R in ohms (Ω): I = VR. Example. I = 20V. 10Ω = 2A. The power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A): P = V × I. Example
