Multiple choice

Directions: Choose the appropriate answer from the options given below:

Which is the unit used to measure electro motive force?

  1. Ohm

  2. Volt

  3. Ampere

  4. Knot

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The volt (V) is the SI unit of electromotive force (emf), also known as voltage or electric potential difference. One volt is defined as the potential difference across a conductor when one ampere of current dissipates one watt of power. The unit is named after Alessandro Volta, the inventor of the electric battery. Ohm measures resistance, ampere measures current, and knot measures speed.

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