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Exam 1 old
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Questions in this quiz (15)
1Two charged particles attract each other with a force F. If the charges on both are doubled, and the distance between the charges is halved then the force
- Ais 16 times stronger.
- Bis 4 time stronger.
- Cis twice as strong
- Dremains the same.
- Eis 1/2 as strong.
2Four charges are located on the corners of a square as shown in the drawing. What is
the direction of the net electric field at the center of the square?
- Atoward the upper left corner of the square
- Btoward the middle of the right side of the square
- Ctoward the middle of the bottom side of the square
- Dtoward the lower right corner of the square
- EThere is no direction. The electric field at the center is zero
3A neutral copper sphere is brought close to a charged insulating sphere. The
electrostatic force between the conducting sphere and insulating sphere is:- Azero
- Battractive
- Crepulsive
- Dattractive or repulsive depending on the sign of the charged sphere.
4 In the opposite corners of a square there are two identical ions. Each has a charge of -e.
The length of each side of the square is L. What is the magnitude of the net electric field
caused by the two negative ions at either one of the empty corners of the square?
- Ake/2L^2
- Bke/L^2
- Csqur(2) ke/L^2
- D2ke/L^2
5 A + 5.0 C charge is located at the origin. A -13.0 C charge is placed at x = 1.0 m. At
what finite location(s) on the x axis will the electric field be equal to zero?- Ain between the particles, closer to the positive particle
- Bin between the particles, closer to the negative particle
- Cnot in between, but closer to the positive particle
- Dnot in between, but closer to the negative particle
- EIt can never be zero.
6A 22-g metal ball hangs from a string. An electric field of 15,000 N/C, pointing to the right, is then turned on. After the electric field is turned on, the ball hangs at a 25 degree angle away from the vertical. What is the charge on the ball?
- A6.8 × 10-7C
- B6.7 × 10-6C
- C6.1 × 10-6C
- D1.4 × 10-5C
- E3.1 × 10-5C
7Consider a cubical box that contains a charge distribution of total charge q = 6.40 μC. The total electric flux through 5 of the 6 sides is Φ = 3.90 × 105 Nm2 /C. What is the electric flux through the remaining sixth surface of the box (in Nm2/C)?
- A3.33 × 10^5
- B3.90 × 10^5
- C4.56 × 10^5
- D5.34 × 10^5
- E6.24 × 10^5
8The electric flux through a spherical Gaussian surface of radius R centered on a charge
Q is 1200 N/(C m2). What is the electric flux through a cubic Gaussian surface of side R
centered on the same charge Q?- Aless than 1200 N/(C m2)
- Bmore than 1200 N/(C m2)
- Cequal to 1200 N/(C m2)
- Dcannot be determined from the information given
9A total of 1.45 x 106 excess electrons are on an initially electrically neutral wire of
length 1.13 m. What is the magnitude of the electric field at a point at a perpendicular distance of 0.015 m away from the center of wire? (Hint: Assume that the length 1.13 m is close enough to “infinitely” long.)- A2.46 · 10-1 N/C
- B2.92 · 10-1 N/C
- C6.77 · 10^1 N/C
- D8.12 · 10^2 N/C
- E3.31 · 10^3 N/C
10An electric dipole is placed into a uniform electric field directed to the right as shown
in the figure. What motion will the dipole have in this electric field?
- AIt will move to the right.
- BIt will move to the left
- CIt will rotate clockwise.
- DIt will rotate counter-clockwise
- EIt will move to the right and rotate clockwise.
11A spherical shell has an outer radius of 0.10 m and an inner radius of 0.040 cm. Within the shell is a charge q = −2.0 × 10−9 C. What is the surface charge density on the outer surface of the shell?
- A−2.0 × 10−9 C/m^2
- B−9.9 × 10−9 C/m^2
- C−1.6 × 10−8 C/m2
- D−3.8 × 10−10 C/m2
- E−8.0 × 10−8 C/m2
12Initially, sphere A has a charge of – 40e and sphere B has a charge of + 20e. The spheres
are made of conducting material and are identical in size. If the spheres then touch, what is
the resulting charge on sphere B?- A– 20e
- B+ 20e
- C– 10e
- D– 40e
- E+ 10e
13 The figure shows two charged particles on an x axis: -q = -4.80 x 10-19
C at x = -2.00 m and q = 4.80 x 10-19 C at x = 2.00 m. What is the x-component of the net electric field produced at point P (located at y = 4.00m)?
- A0
- B1.93E-10 N/C
- C-1.93E-10 N/C
- D4.22 E-10 N/C
- E-1.6E-9 N/C
14A particle of charge -2.50 x 10-7 C is located in a uniform electric field. The direction of the electric field is to the left (←). What is the direction of the force on the particle?
- ANo direction, as the force on the particle is zero.
- B←
- C→
- D↑
- E↓
15The figure below shows a spherical shell with uniform volume charge density ρ = 1.84 nC/m3, inner radius a = 10.0 cm, and outer radius b = 2.00 a.
What is the magnitude of the electric field (in N/C) at r = 1.5 a?
- A5.21 x 10^2
- B1.57 x 10^3
- C7.32
- D1.5
- E6.31
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- Quiz on Exam 1 old, created by hank fournier on 31/07/2018.
- Author
- hank fournier
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- English
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