Physical and Theoretical Chemistry

Other Spectroscopy

What is electrical resistance?

Electrical resistance describes how a material opposes an electric current through the material. The resistance is related to the applied voltage through the relationship:

where V is the applied voltage and I is the current through the material. Typically the resistance is a constant, and thus the current will increase linearly with an increase in the applied voltage. This relationship is Ohm’s law. As you can see, a material with a higher resistance (R) will have a lower current (I) for a given applied voltage (V).


This is a web preview of the "The Handy Chemistry Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App