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Grade: 12
        
An aluminum wire of diameter 4mm carries a current of 4.4 A.The current density is 
4 months ago

Answers : (1)

Arun
23020 Points
							

So here we've an aluminum wire of thickness 4mm

Thus, r=2mm and I=2.2A

Current Density,

J=I/A

A= πr²= π(2x10^-3

J= (2.2/π(2x10^-3)²)

 =1.75x0^5 A/m²

4 months ago
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