In this video David derives the formula to find the power used by a resistor. Created by David SantoPietro.

Let's learn how to calculate electric power delivered & consumed in any circuit.

The electric power consumed by a device may be calculated by using either of the two expressions P=I^2 R or P=V^2 /R. The first expression indicates that it is directly proportional to R whereas the …

Learn what power means and how we use it to describe the rate of energy transfer.

Let's practice some problems to better understand the concept of electric power and its relation with voltage and current in a circuit.

We can't imagine our lives without electricity. But what exactly is electricity? How does electricity light up our houses? What does a battery do? What is the cost of electricity? We will answer all these …

Let's learn how to calculate electric power delivered & consumed in any circuit.

For both gravity and electricity, potential energy differences are what's important. Wherever your book starts out, it has some potential energy. When you move the book, you add or remove potential …

Learn about power, its definition, and how it relates to work and energy in this comprehensive Khan Academy tutorial.

Electric power and DC circuits Learn DC Circuit and electrical power review Electric power Solved example: Power dissipated in bulbs