1. About how many coulombs are involved in a lightning bolt?

a. 1.0*10^24 C

b. 1.0 * 10^7 C

c. 1.0*10^12

d. 1.0*10^1

 

2. When moving a negative charge closer to a positive source charge, which of the following happens?

a. The charge does work

b. The potential energy of the charge increases.

c. Work must be done on the charge

d. There is no change in potential energy

 

3. If you increase the distance between two identical point charges so that the new distance is five times the original distance, what happens to the force between them?

a. It is divided by 25

b. It is multiplied by 5

c. It is divided by 5

d. It is multiplied by 25

 

4. If you decrease the distance between two identical point charges so that the new distance is one third their initial distance apart, what happens to the force between them?

a. It is divided by 3.

b. It is multiplied by 3

c. It is divided by 9

d. It is multiplied by 9

 

5. A test charge of 1.0*10^-5 C is at a point in an electric field where the field strength is 2.0*10^4 N/C. What is the magnitude of the force experienced by the test charge and in what direction is the force compared to the field?

a. 0.10 N same direction

b.0.20 N same direction

c.0.20 N opposite direction

d.0.10 N opposite direection

 

6. What is the change in electric potential difference when 30.0 J of work is done on a charge of 0.010 C?

a. -3000 V

b. 300 V

c. -300 V

d. 3000 V

 

7. For an electric field shown with a positive source charge, which of the following statements describes a decrease in voltage?

a. A positive charge moves across an equipotential line away from the source charge.

b. A positive charge crosses equipotential lines toward the source charge.

c. You cannot tell from the information given

d. a positive charge moves along an equipotential line

 

8.Which of the following processes charges an object by friction?

a. triboelectrification

b. conduction

c piezoelectric effect

d. induction

 

9. A 3.0 uC point charge is 0.030 m from another point charge and experiences an attractive force of 180 N. What is the magnitude of the other charge? uC=1.0*10^-6C

a. -6.0 uC

b. -3.0 uC

c. 6.0 uC

d. 3.0 uC

 

10. An electric field measured near a point charge of 3.00*10^-6 C has a strength of 1.50*10^5 N/C. How far is the point from the source charge?

a. 0.36 m

b. 0.095 m

c. 0.42 m

d. 0.30 m

 

11. Which of the following processes is a special case of induction?

a. piezoelectric effect

b. charge polarization

c. triboelectrification

d. conduction

 

12. Two parallel plates have an electric potential difference of 20.0 V. if the electric field between them has a strength of 1.0*10^3 N/C. then how far apart are the plates?

a. 5.0 cm

b. 1.0 cm

c. 10.0 cm

d. 2.0 cm

 

13. Which of the follwing characteristics would cause an object to be positively charged

a. deficient protons on the surface

b. deficient elecrons on the surface

c. excess electrons on the surface

d. deficeint protons on the inside

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Status NEW Posted 23 May 2017 12:05 AM My Price 16.00

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