EXPLANATION
- a) Volt
- b) Ohm
- c) Ampere
- d) Coulomb
ANSWER: d) Coulomb
EXPLANATION:
The SI unit of electric charge is the Coulomb (d).
The Coulomb (symbol: C) is the unit of electric charge in the International System of Units (SI). It is named after Charles-Augustin de Coulomb, a French physicist who conducted pioneering work in the field of electromagnetism.
The Coulomb is defined in terms of the Ampere (A), which is the SI unit of electric current. The Coulomb is defined as the amount of electric charge that passes through a conductor in one second when a constant current of one Ampere is flowing. Mathematically, it can be expressed as:
1 Coulomb = 1 Ampere × 1 second
To visualize this, imagine a flow of water through a pipe. The amount of water that passes through the pipe in a given time is analogous to an electric charge flowing through a conductor. The Coulomb is a measure of the total charge that flows, just as liters or gallons would measure the total amount of water that passes through the pipe.
For example, if a current of 2 Amperes flows through a conductor for 3 seconds, the total charge that passes through the conductor is:
Q = I × t = 2 A × 3 s = 6 C
So, in this case, 6 Coulombs of charge have flowed through the conductor.
The Coulomb is a fundamental unit in electromagnetism and is used to measure the quantity of electric charge. It is applicable to various aspects of electrical systems and phenomena, such as calculating the charge stored in capacitors, determining the force between charged particles, understanding the behavior of electric currents, and many other electrical calculations.
In summary, the SI unit of electric charge is the Coulomb (C), which represents the amount of charge passing through a conductor when a current of one Ampere flows for one second. It is a fundamental unit in electromagnetism and is widely used in various applications within the field of electricity and magnetism.
