What is the SI unit of current?

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  1. Coulomb
  2. Ampere
  3. Ohm
  4. Volt

Answer (Detailed Solution Below)

Option 2 : Ampere
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The correct answer is Ampere

Explanation:

  • Electric current is a flow of electric charge.
  • The SI unit of electric current is the ampere, which is often shortened to "amp". It is named after André-Marie Ampère, one of the main discoverers of electromagnetism.
  • One ampere of current is defined as one coulomb of charge passing through a given point in a circuit in one second.

\({\rm{Electric\;curernt\;}}\left( {\rm{I}} \right) = \frac{{{\rm{Electric\;charge}}\;\left( {\rm{Q}} \right)}}{{{\rm{Time\;}}\left( {\rm{t}} \right)}}\)

Other Options:

  • Coulomb: The coulomb is the SI unit of electric charge, not current. One coulomb is equal to the charge of approximately 6.242 x 1018 electrons.
  • Ohm: The ohm is the SI unit of electrical resistance. It measures how much a material resists the flow of electric current.
  • Volt: The volt is the SI unit of electric potential difference or electromotive force. It measures the potential energy difference per unit charge between two points in a circuit.
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