Current Density
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Remember that
current density always describes the current in relation
to the cross-sectional area.
The current is divided by the conductor cross-section.
Use the values given in the task and
then check the unit.
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A current of 20 A and
a conductor cross-section of 4 mm² are given.
The current density is calculated
by dividing the current by the
conductor cross-section.
Substituting the values: 20 A ÷ 4 mm².
The calculation gives: 20 ÷ 4 = 5.
The unit is A/mm².
The current density is 5 A/mm².
A current of 20 A flows through a conductor with a cross-section of 4 mm².
What is the current density?
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