Why current is considered as fundamental quantity?

Current in and of itself can be made to change, as you have pointed out, and thus be variations on a theme. Electricity itself, has a specified rate at which it travels through individual conducting materials, so maybe that is why current is spoken of as a fundamental quantity.

Why electric current is not a derived quantity?

Originally Answered: Why is current not a derived quantity? Because it is easier to measure a current and then decine a charge than measuring a charge and then define a current.

What is the fundamental quantity of electricity?

The fundamental unit of electricity is the negative charge of the electron or the positive charge of an ionised atom that has lost a single electron (resulting from the positive charge on the protons in the nucleus outnumbering that of the remaining electrons). Electrical charge is measured in coulombs (symbol C).

Is electric charge a fundamental or derived quantity?

There are seven base units from which all other units are derived. Electric charge is measured in Coulombs, or Amperes seconds. In SI, current is a fundamental unit (ampere) and charge is a derived unit (coulomb = ampere · second) for practical reasons.

Why is the Coulomb considered as the fundamental unit of electrical charge?

As per wikipedia: The SI unit of charge, the coulomb, “is the quantity of electricity carried in 1 second by a current of 1 ampere”. The coulomb is defined using the ampere, so per the definition, it’s not fundamental. The ampere is, because it isn’t defined using other units.

Is electric current a fundamental physical quantity?

The current can also be derived if we know the no of charges flowing in the conductor. But it is easy to measure the current using some instruments such as an ammeter than counting the no of charges flowing in the circuit. Thus current is considered as the fundamental physical quantity and charge is a derived quantity.

Why is current a physical quantity?

Current, instead of charge is taken as a fundamental quantity simply because it is measurable. Charge is not measurable.

Is electric current a derived quantity?

The units of a derived physical quantity are called derived quantity. Examples of fundamental quantity are mass, length, electric current, temperature, amount of substance, and luminous intensity. Area, speed, velocity, etc are examples of the derived physical quantity.

Why is the coulomb considered as the fundamental unit of electrical charge?

Is electric charge a fundamental unit?

The magnitude of charge carried by an electron or proton is called the fundamental unit of charge. The fundamental unit of charge has the value 1.602 × 1 0 − 19 C 1.602 \times {10^{ – 19}}C 1. It is also called the elementary charge.