A3.80 mm diameter wire carries a 15.2 A current when the electric field is 8.60x10-2 V/m Part A What is the wire's resistivity? p= 6.42x10-8 Am Previous Answers v Correct Correct answer is shown. Your answer 6.4167-10-8 = 6.4167x10-8 f2m was either rounded differently or used a different number required for this part. significant figures than Part B If a battery voltage of 8.55 V is applied to this wire to produce this current, how long must it be? ? L= 994 Submit Previous Answers Request Answer
A3.80 mm diameter wire carries a 15.2 A current when the electric field is 8.60x10-2 V/m Part A What is the wire's resistivity? p= 6.42x10-8 Am Previous Answers v Correct Correct answer is shown. Your answer 6.4167-10-8 = 6.4167x10-8 f2m was either rounded differently or used a different number required for this part. significant figures than Part B If a battery voltage of 8.55 V is applied to this wire to produce this current, how long must it be? ? L= 994 Submit Previous Answers Request Answer
Chapter7: Electricity
Section: Chapter Questions
Problem 13P
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Step 1
Part A)
Let the radius of the cross-section of the wire be r, the area of the cross-section of the wire be A, the magnitude of the electric field applied be E, and the current flowing through the wire be I.
The value of resistivity of the wire is calculated by using the following equation.
In this case,
r = 1.90×10-3 m
Substitute the required values in equation (1) to get the value of the resistivity of the material of the wire in the following way.
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