Basics for circuits 23

The definition for potential difference

• energy per unit charge

• ratio of charge to time

• rate of flow of current

• ratio of potential difference to curent

The definition for current

• energy per unit charge

• ratio of charge to time

• rate of flow of charge

• ratio of potential difference to current

The definition for resistance

• energy per unit current

• ratio of charge to time

• rate of flow of energy

• ratio of potential difference to current

The definition for power

• work done per unit time

• ratio of charge to time

• rate of flow of energy

• ratio of potential difference to current

The unit for resistance

• Ω

• A

• V

• W

The unit for power

• Ω

• A

• V

• W

The unit for current

• Ω

• A

• V

• W

The unit for potential difference

• Ω

• A

• V

• W

The unit for electric charge

• Ω

• A

• J

• C

The unit for work done

• Ω

• A

• J

• C