7. A rod of length L lies along the y-axis with its end at the origin. It has a nonuniform The electric potential at point A is (a is constant) charge density=ay. kx A. V = dx d+x B. V = A C. V = dx kay D.V=j -dy d+v -dy kax d+x
7. A rod of length L lies along the y-axis with its end at the origin. It has a nonuniform The electric potential at point A is (a is constant) charge density=ay. kx A. V = dx d+x B. V = A C. V = dx kay D.V=j -dy d+v -dy kax d+x
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter20: Electric Potential And Capacitance
Section: Chapter Questions
Problem 46P
Related questions
Question
please solve question 7 only
Transcribed Image Text:The first three questions are about the following situation:
The following circuit contains three capacitors C₁ = 20 μF, C₂ = 8 μF, and C₂ = 12 μP
connected to a battery with an unknown emf e. The charge on capacitor C₁is Q₁ = 14 μC.
1. What is the equivalent capacitance Ceq of the circuit?
tha
A. 7.5 x 10-6 F
B. 8.0 x 10-6 F
C. 10.0 x 10-6 F
D. 12.0 x 10-6 F
E
2. How much energy is stored on capacitor C₁?
C₂
C3
A. 4.9 x 10-6J
B. 3.0 x 10-6 J
C. 2.5 x 10-61
D. 4.5 x 10-6 J
3. What is the charge Q₂ on capacitor C₂?
A. 9.0 x 10-6C
B. 3.3 x 10-6C
C. 4.5 x 10-6 C
D. 5.6 x 10-C
4. A parallel-plate capacitor has plates of dimensions 2.0 cm by 3.0 cm separated by a 1.0-
mm thickness of dielectric material (k=11.1), what is its capacitance?
B. 40 pF
A. 20 pF
C. 60 pF
D. 80 pF
5. A spherical liquid drop of radius R has a capacitance of C= 4ne, R. If two such drops
combine to form a single larger drop, what is its capacitance?
A. 2 C
B. C
C. 1.26 C
D. 1.46 C
![6. Over a certain region of space, the electric potential function is V = 5x - 3x² y + 2 y 2².
What is the electric field at the point P, which has coordinates (1,1,1).
C. -5i+]
A. 67-2
B.-J+k
D. 1+)-4k
7. A rod of length L lies along the y-axis with its end at the origin. It has a nonuniform
charge density λ=ay. The electric potential at point A is (a is constant)
½kx
A. V =
dx
B. V =
-dy
+X
A
kax
C. V =
d+x
L
kay
D. V = [ dy
d+y
8. A wire of 2 mm² cross-sectional area and 1.3 cm long contains 2 x10 electrons. It has a
102 resistance. What is the drift velocity of the charges in the wire when 5 Volts battery
is applied across it?
A. 2 x 10 m/s
B. 7.8 x 10 m/s
C. 1.6 x 10-3 m/s
D. 3.9 x 10 m/s
9. A toaster is rated at 550 W when connected to a 220 V source. What current does the
toaster carry?
C. 3.0 A
B. 2.5A
D. 3.5A
A 20A
10. What does it cost to cook a chicken for 2 hours in an oven that operates at 20 Ampere and
220 Volt if the electric company charge 40 fils per kWh
D. 176 Fils
C. 352 Fils
B. 528 Fils
A. 264 Fils
11. The quantity of charge q (in coulombs) that has passed through a surface varies with time
according to the equation q=t+St+6, where 1 is in seconds. What is the
instantaneous current through the surface at t = 1.00 s?
D. 9A
C. 7A
B. 13 A
A. 17 A
12. A circuit has 4 capacitors of equal capacitance Ca = 30 pF. What is the equivalent
capacitance Ce of the circuit?
S
Ç
A. 40 pF
B. 30 µF
C. 20 pF
D. 50 pF
17
E. 10 pF
0
0
d+x
ky
dx](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1788a385-2711-4c2a-8e3f-6856cd442c5e%2Fbe2b31ae-0bca-42ad-89ef-d8bf9ae68fb8%2Fl7yawdc_processed.jpeg&w=3840&q=75)
Transcribed Image Text:6. Over a certain region of space, the electric potential function is V = 5x - 3x² y + 2 y 2².
What is the electric field at the point P, which has coordinates (1,1,1).
C. -5i+]
A. 67-2
B.-J+k
D. 1+)-4k
7. A rod of length L lies along the y-axis with its end at the origin. It has a nonuniform
charge density λ=ay. The electric potential at point A is (a is constant)
½kx
A. V =
dx
B. V =
-dy
+X
A
kax
C. V =
d+x
L
kay
D. V = [ dy
d+y
8. A wire of 2 mm² cross-sectional area and 1.3 cm long contains 2 x10 electrons. It has a
102 resistance. What is the drift velocity of the charges in the wire when 5 Volts battery
is applied across it?
A. 2 x 10 m/s
B. 7.8 x 10 m/s
C. 1.6 x 10-3 m/s
D. 3.9 x 10 m/s
9. A toaster is rated at 550 W when connected to a 220 V source. What current does the
toaster carry?
C. 3.0 A
B. 2.5A
D. 3.5A
A 20A
10. What does it cost to cook a chicken for 2 hours in an oven that operates at 20 Ampere and
220 Volt if the electric company charge 40 fils per kWh
D. 176 Fils
C. 352 Fils
B. 528 Fils
A. 264 Fils
11. The quantity of charge q (in coulombs) that has passed through a surface varies with time
according to the equation q=t+St+6, where 1 is in seconds. What is the
instantaneous current through the surface at t = 1.00 s?
D. 9A
C. 7A
B. 13 A
A. 17 A
12. A circuit has 4 capacitors of equal capacitance Ca = 30 pF. What is the equivalent
capacitance Ce of the circuit?
S
Ç
A. 40 pF
B. 30 µF
C. 20 pF
D. 50 pF
17
E. 10 pF
0
0
d+x
ky
dx
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