# Electric Power and Efficiency Calculator

The Electric Power and Efficiency Calculator will calculate the:

 🖹 Normal View🗖 Full Page View Calculator Precision (Decimal Places)0123456789101112131415 Electromotive force of battery (ε) V Current flowing in the main branch of the circuit (I) A Potential difference across the circuit component (ΔV) V
 The output power delivered by a circuit component is W [Watt] The input (total) power of the circuit delivered by the battery is W [Watt] The efficiency of the electric circuit is % [Percent] Po = I × ∆VPo = × Po = Pi = I × εPi = × Pi = e = ∆V/ε × 100%e = ∆V/ε × 100%e = Electromotive force of battery (ε) V [Volt] Current flowing in the main branch of the circuit (I) A [Amp] Potential difference across the circuit component (ΔV) V [Volt]

Please note that the formula for each calculation along with detailed calculations are available below. As you enter the specific factors of each electric power and efficiency calculation, the Electric Power And Efficiency Calculator will automatically calculate the results and update the Physics formula elements with each element of the electric power and efficiency calculation. You can then email or print this electric power and efficiency calculation as required for later use.

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Section 14: Electrostatics

Section 15: Electrodynamics

Classical Mechanics

Po = I × ∆V

Pi = I × ε

## Efficiency of the circuit Formula and Calculation

e = ∆V/ε × 100%

This formula derives from

e = Po/Pi × 100% = I × ∆V/I × ε × 100% = ∆V/ε × 100%

## Electrodynamics Physics Tutorials associated with the Electric Power And Efficiency Calculator

The following Physics tutorials are provided within the Electrodynamics section of our Free Physics Tutorials. Each Electrodynamics tutorial includes detailed Electrodynamics formula and example of how to calculate and resolve specific Electrodynamics questions and problems. At the end of each Electrodynamics tutorial you will find Electrodynamics revision questions with a hidden answer that reveals when clicked. This allows you to learn about Electrodynamics and test your knowledge of Physics by answering the test questions on Electrodynamics.

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