Lesson: The Power of Electrical Components

In this lesson, we will learn how to use the formula E = QV to find the energy dissipated to the environment by the component of an electronic circuit.

Video

10:37

Sample Question Videos

02:19
06:49

Worksheet: 12 Questions • 2 Videos

Q1:

The potential difference across a resistor in a circuit is 10 V. If 150 C of charge passes through the resistor, how much energy is dissipated to the environment by the resistor?

Q2:

A piece of connecting wire in a circuit is 20 cm long. It has a resistance of 0.02 Ω and dissipates energy to its environment as heat at a rate of 2 W. How much is the current passing through the wire?

Q3:

A 4 A current passes through a 10 Ω resistor. How much is the power of the resistor?

Preview Download