Question
What is the SI unit of Charge?
This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is
Coulomb
The question asks for the SI unit of charge. Let's explore the options given to understand which is correct.
- Coulomb: The SI unit of electric charge is the Coulomb (symbol: C). One Coulomb is defined as the amount of charge transferred by a current of one ampere in one second. Thus, the definition adheres to the unit of charge.
- Amperes: This is the SI unit of electric current, not charge. One ampere is defined as one Coulomb of charge passing a point in a conductor in one second. Hence, amperes measure the flow of charge, not charge itself.
- Watts: Watts measure power, which is the rate of energy transfer or conversion. It is not related to measuring charge.
- Joules: Joules are the SI unit of energy. While they are related to the work done by an electric field on a charge, they do not measure charge itself.
Given this breakdown of options, the correct answer is Coulomb. The other options relate to different physical quantities: Amperes to current, Watts to power, and Joules to energy.
Therefore, the SI unit of charge is indeed Coulomb.
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