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A copper conductor of area of cross- sec...

A copper conductor of area of cross- section 40 `mm^(2)` on a side carries a constant current of ` 32 xx 10^(-6)A`. Then the current density is (in `amp//m^(2)`)

A

`1.6`

B

`0.8`

C

`0.4`

D

`3.2`

Text Solution

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The correct Answer is:
B
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