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Q. 5

Expert-verified
Found in: Page 761

### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

# What is the difference between current and current density?

Charge moves through a wire at a rate known as current.

The density of current flow within the conductors is called current density

See the step by step solution

## Step 1: Concept Introduction

A conductor's current is defined as the rate at which electric charges flow through it. Current density is defined as the volumetric flow of charge per unit area through a conductor.

## Step 2: Explanation (Part a)

Difference between current and current density:

The current flow is sustained by an established electric field.

Here, is current in Ampere, is charge in Coulomb, and is time in seconds.

The current density written as follows.

Here, is current density in is current in Amperes, and is area of conductor in