Question

$1$ volt equals

• A. $1$ joule
• B. $1$ joule per coulomb
• C. $1$ coulomb per metre
• D. $1$ newton per coulomb

Answer 1

The correct option is B

$1$ joule per coulomb

1. The electrical unit of voltage or potential difference is the volt.
2. A one-volt voltage difference drives one ampere of current via a one-ohm resistance wire.
3. To transfer an electric charge of one coulomb over a potential difference of one volt, one joule of work is required.
4. One joule per coulomb is equal to one volt.

Hence, option B is correct.