Question 1 Part (a) I measure the resistance of this wire and find it to be R = 156 92. What is the resistivity of the material the wire is made out of? P-5.182-10-4 p-5.182 x 10-4 ✓ Correct! Part (b) What is the conductivity of this wire, in inverse Ohms per meter? a=1929.8 A particular wire has a length of L = 2.7 m and a circular cross-sectional area of radius r= 1.69 mm. Part (c) 1930. ✓ Correct! Part (c) Give an expression for the current density in the wire if an electric field E is passing through it. Write this in terms of the resistivity and the other variables in the problem.
Question 1 Part (a) I measure the resistance of this wire and find it to be R = 156 92. What is the resistivity of the material the wire is made out of? P-5.182-10-4 p-5.182 x 10-4 ✓ Correct! Part (b) What is the conductivity of this wire, in inverse Ohms per meter? a=1929.8 A particular wire has a length of L = 2.7 m and a circular cross-sectional area of radius r= 1.69 mm. Part (c) 1930. ✓ Correct! Part (c) Give an expression for the current density in the wire if an electric field E is passing through it. Write this in terms of the resistivity and the other variables in the problem.
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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Transcribed Image Text:Question 1
I=
Part (a) I measure the resistance of this wire and find it to be R = 156 Q2. What is the resistivity of the material the wire is made out of?
p=5.182 *10-4
p=5.182 x 10-4 ✓ Correct!
Part (b) What is the conductivity of this wire, in inverse Ohms per meter?
1930. ✓ Correct!
o=1929.8
Part (c)
Part (c) Give an expression for the current density in the wire if an electric field E is passing through it. Write this in terms of the resistivity and the other
variables in the problem.
A particular wire has a length of L = 2.7 m and a circular cross-sectional area of radius r = 1.69 mm.
X J= EL/Rar²
x J= E/p
Question 2
Correct Answer
E-Pat
sin())
cotan()
atan()
cosh()
E-4.752x10 ✓ Correct!
B
8
L
P
Student Final Submission
E-Pat
Part (b) How much energy has been used in joules?
Y
d
h
m
7
Part (d) Calculate the current in the wire, in milliamperes, if the field strength is 5.28 V/m.
r
cos()
asin()
acotan()
sinh()
tanh() cotanh()
Degrees O Radians
You leave a 110 W light bulb on for 12 hours in the day.
Part (a) Express energy through power and time interval dr.
P
tan()
sin() cos()
cotan() asin() acos()
atan() acotan() sinh()
cosh()
tanh() cotanh()
Degrees O Radians
7
tan()
acos()
I
E
j
n
R
(7
1^^ 4
1
8
5 6
1 2 3
0
+
NO BACKSPACE DEL
Feedback
Correct!
-
π (7 89
EMAAL 4 5 6
1 2
+
0
NO BACKSPACE DEL CLEAR
3
END
HOME
+
A (789 HOME
EM4 5 6
1 2 3
0
VO BACKSPACE
END
CLEAR
END
CLEAR
Part (c) If the energy used were used to lift a weight of m=225 kg, write an equation of the height that the weight can be lifted in terms of P, 4t, and m
k-(P) (Mt)(mg) ✔Correct!
Part (d) Calculate the numerical value of h.
h=||
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