If a current of 2. 4 a is flowing in a wire of diameter 2. 0 mm, what is the average current density?

Physics

1 answer:

HACTEHA [7]2 years ago

5 0

The average current density is 7.6 × 10⁵ A/m².

To calculate the current density current will be 2.4 A.

Diameter of a wire = 2mm.

The cross-sectional area of the wire is given by r = d/2

where r is the radius of the wire.

Then, the cross-sectional area is = 0.00000314159265

= 3.1 × 10⁻⁶ m².

<h3>What is average current density?</h3>

Consider a current carrying conductor, the current density depends upon the current flow in the conductor. If the current flow in the conductor will be high then the current density will also be high. Using the average current flowing through the conductor, the average current density will be found.

Average current density j = I / A Ampere/ meter².

By substituting the values in the formula,

j = 2.4 / ( 3.1 × 10⁻⁶)

= 7.6 × 10⁵ A/m².

Hence, the current density can be calculated.

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