An electric current is expressed by a unit called _________.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2. i.e. ampere.
| Electric current | A common unit of electric current is the ampere, which is defined as a flow of one coulomb of charge per second, or 6.2 × 1018 electrons per second. |
| Watt | SI is the standard unit of power (energy per unit time), the equivalent of one joule per second. |
| Meter | The meter, symbol m, is the SI unit of length. |
| Joule | The SI unit of work is the joule (J). A body can be moved by exerting 1 Newton of force over a distance of 1 meter using 1 Joule of energy. 1 J = 1 N × 1 m. |