What is the magnitude of the applied electric field inside an aluminum wire of radius 1.4 mm that carries a 4.5-A current

Explanation:

From the question we are told that

    The radius is  

     The  current is  

Generally the electric field is mathematically represented as

Where is the conductivity of  aluminum with value

J is the current density which mathematically represented as  

Here A is the cross-sectional area which is mathematically represented as  

So

So

c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

i hope that ! =)

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )