Question

What is the SI unit for charge?

Answer 1

Hint: Recall the basics of an electric charge and the unit of the electric charge. From this definition, determine the basic unit of the electric charge and the unit of the charge named after the scientist. From these units, give the definition of the unit of an electric charge.

Complete step by step solution:
The property of matter by virtue of which it experiences a force when it is placed in an electric field is known as electric charge. The SI units of charge are Ampere-second or Coulomb. When one ampere of electric current flows through the current carrying conductor for one second, then the amount of charge through the conductor is one coulomb.
 \[1coulomb = (1amphere)(1\second)\]
Additional information:
To solve this problem we should know about the International system of units (SI) Unit, fundamental unit, fundamental quantity, Derived unit, derived quantity, Electric charge, using this information we can easily approach our answer.
The international system of units abbreviated as SI, is a scientific practice of expressing the magnitude or quantities of important natural phenomena. There are seven basic units in the system, from which other units are derived.
The first is the number which indicates the magnitude of quantity and second indicates the standard.
Unit: The standard used for measurement of a physical quantity is called unit of the quantity.
Fundamental unit: The units used to measure fundamental quantities are known as fundamental units.
Fundamental Quantities: Fundamental Quantities are the Physical quantities which do not rely on any other physical quantities for their measurement are known as fundamental quantities.
Derived units: Derived units are defined as units used to measure derived quantities are called derived units.
Derived Quantities: Physical quantities which rely on one or more fundamental quantities for their measurement are called derived quantities.

Note: The students may think that electric charge can have two SI units. They should keep in mind that ampere-second and coulomb explained in the above solution are both SI units of the electric charge. The unit ampere-second is determined from the formula of the electric charge and the unit coulomb is named after the scientist Charles-Augustin de Coulomb.