Question

A copper wire of length 10 m and radius $(\frac{10^{-2}} { √π})$ has electrical resistance of 10 Ω. The current density in the wire for an electric field strength of $(\frac{V}{m})$ is:

• A. 104 $\frac{A}{m^2}$
• B. 106 $\frac{A}{m^2}$
• C. 10-5 $\frac{A}{m^2}$
• D. 105 $\frac{A}{m^2}$

Answer 1

Answer: (D)

105 $\frac{A}{m^2}$

Answer 2

The correct answer is (d). 105 $\frac{A}{m^2}$