A 18-cm-long nichrome wire is connected across the terminals of a 1.5 V battery. ▼ J= 5.6×106 A m² Submit Previous Answers ✓ Correct Correct answer is shown. Your answer 5.58.10⁰ was either rounded differently or used a different number of significant figures than required for this part. Part C If the current in the wire is 3.0 A, what is the wire's diameter? Express your answer with the appropriate units. μÅ xa Xb d= 0.8 10 Submit -4 . x 10m m X Previous Answers Request Answer ? X Incorrect; Try Again; 7 attempts remaining

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A 18-cm-long nichrome wire is connected across
the terminals of a 1.5 V battery.
▼
J= 5.6×106 A
m²
Submit Previous Answers
✓ Correct
Correct answer is shown. Your answer 5.58.10⁰ was either rounded differently or
used a different number of significant figures than required for this part.
Part C
If the current in the wire is 3.0 A, what is the wire's diameter?
Express your answer with the appropriate units.
μÅ
xa Xb
d= 0.8 10
Submit
-4
.
x 10m
m
X
Previous Answers Request Answer
?
X Incorrect; Try Again; 7 attempts remaining
Transcribed Image Text:A 18-cm-long nichrome wire is connected across the terminals of a 1.5 V battery. ▼ J= 5.6×106 A m² Submit Previous Answers ✓ Correct Correct answer is shown. Your answer 5.58.10⁰ was either rounded differently or used a different number of significant figures than required for this part. Part C If the current in the wire is 3.0 A, what is the wire's diameter? Express your answer with the appropriate units. μÅ xa Xb d= 0.8 10 Submit -4 . x 10m m X Previous Answers Request Answer ? X Incorrect; Try Again; 7 attempts remaining
Expert Solution
Step 1

We know, 

J = I/A ; or, A = I/J

J is current density

I is current

A = (πd2)/4  is cross section of the wire. 

d is diameter of the wire. 

 

 

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