Stretching the A-Rod previous l 11 of 15 Stretching the A-Rod Hints My Answers G

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Stretching the A-Rod previous l 11 of 15 Stretching the A-Rod Hints My Answers Give Up Review Part Submit To learn to apply the concept of current density and microscopic Ohm's law. Part C A slab of metal of volume Vis made into a rod of A piece of copper is made into a rod with a square cross-section. The side of the square is 2.00 centimeters. length L The rod cames cument I when the The resistivity of oopper is 1.7-10 2.m An unknown electric field E directed along the rod, creates a electric field inside is E current of 12.0 amperes through the rod. Find the magnitude of E. Use two significant figures in your answer. Express your answer in newtons per coulomb. N/C Submit Hints My Answers Give Up Review Part The Electric Fi. x MasteringPhys. x L MasteringPhys. x Provide Feedback Continue session mastering physics.com/myct/itemview?assignmentProblemID 432756018offse O CD

Explanation / Answer

E = Voltage/L

E =i*R/L

E = I*rowL/AL = I*row/A

Coming to A => A = a^3

A = 8*10^-6

E = (12*1.7*10^-8)/(8*10^-6) = 0.0255 N/C

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