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Sedbober [7]
2 years ago
4

A current of 1.0 A from a 1.0 mm diameter wire enters a sphere which is 1.0 m in radius and exits through a 1.0 mm diameter wire

on the opposite side of the sphere. What is the smallest value of current density in the sphere?
Physics
1 answer:
Savatey [412]2 years ago
6 0

Answer:

The current density in the sphere is 0.32 A/m²

Explanation:

Given that,

Current = 1.0 A

Diameter = 1.0 mm

Radius of sphere = 1.0 m

We need to calculate the current density in the sphere

Using formula of current density

J=\dfrac{I}{A}

Where, I = total current

A = area of sphere

Put the value into the formula

J=\dfrac{1.0}{\pi\times(1.0)^2}

J=0.32\ A/m^2

Hence, The current density in the sphere is 0.32 A/m²

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