Lesson: Power and Energy
In this lesson, we will learn how to use the formula P = E/t to calculate the rate at which energy is transferred by a device given the amount of energy it transfers in a given time.
Sample Question Videos
Worksheet: 17 Questions • 2 Videos
Which of the following is the correct formula for the energy transferred, , in a given time, , for an electrical appliance with a given power, ?
What is 50 MW in watts?
A microwave is used for 5 minutes, during which time it is supplied with 180 kJ of energy. What is the power of the microwave?