How does the temperature depend on the resistance?

Electrical resistance

Illustration of electrical resistance

Illustration of the electrical resistance

The electrical resistance is a measure of how much voltage is required to achieve a certain current flow (current strength) in an electrical conductor.

This can be illustrated with the following comparisons:

  • water
    If you stand on the bank of a large river, significantly more water can flow past with the same gradient than with a narrow river
  • traffic
    You stand at the edge of a street. Significantly more cars can pass by on a three-lane highway than on a single-lane highway

Electrical Resistance Facts

  • Unit: 1 Ohm (Ω)
  • The higher the electrical resistance of a conductor,
    the lower the current flow / the current strength (indirect proportionality)

What does the electrical resistance of a conductor depend on?

  • cross-section
  • material
  • length
  • temperature

More detailed information is available on the Resistance of a conductor page.

Comment # 8678 by 3c, pgrg 1328.03.14 9:25 AM
3c, pgrg 13

Dear Ladies and Gentlemen!
The picture to illustrate the electrical resistance is wrong! The same number of electrons should be drawn everywhere in the conductor. They are only slower with greater resistance. We ask you to change this picture.
Her 3C at the Dominican High School, Vienna