Dimensions of Current

Introduction: Dimensions of Current

A stream of particles, such as ions and electrons, travelling through an electrical conductor or space is known as an electric current. It’s the net rate of electric charge flow through a surface and into a control container that’s monitored.

A brief outline

The ampere, or amp, is the SI unit of current flow, which is specified as the passage of electric charge along a surface at a rate of one coulomb per second. An SI base unit is the ampere (symbol: A). An ammeter is a gadget that is used to measure electric current.

Also Read Related Topic: Dimensions Of Current Density

Important concepts

Current density is a vector quantity, despite the fact that it can be expressed as the ratio of two scalar numbers (current and area). The direction of current density in the path of electric current flow is perpendicular to the cross-sectional area. The ratio of the electric field to the resistivity of material can alternatively be represented as current density. Because the electric field is a vector, the fact that the current density is a vector becomes evident. The current density is in the electric field’s direction.

The dimensional formula of current is specified by,

[M⁰ L⁰ T⁰ I¹]

M = Mass, I = Current, L = Length, T = Time

Has a relation formula with charge defined as

I=Q/T

Q = Charge

T = Time

So, from here we originate unit of currency to be

Coulomb/second

But it has a different fundamental unit

Ampere

Definition of Current

The flow of charge per unit time is defined as current.

Dimensional formula:

[MⁿLⁿTⁿA¹], n=0

Significance of dimensions of current in IIT JEE exam

It is critical to take a holistic approach to every facet of a subject’s chapter. It will not only adequately prepare you for the exam, but will also clarify your understanding of each topic. It will help you pass the JEE exam’s conceptual problems. The number of questions from the chapter unit and dimensions would be one or two, with a weightage of roughly four marks.

FAQs

What is really meant by current density?

Current density is the rate at which charge runs through a given unit area; it is described as a vector whose magnitude is the current per unit cross-sectional area. If the moving charges are positive, the current density has the same sign as their velocity.

What is the effect of electric current on heating?

Electrical energy is turned into heat energy in the heating effect. The heating effect of electric current is a phenomenon that occurs when an electric current is transmitted through a wire that becomes heated.

What is the definition of electric current?

The pace at which electrons travel through a conductor is known as electric current. The ampere is the SI unit for electrical current. Electrons are tiny particles that reside within a substance's molecular structure.