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Electrostatic quiz #2 cloned 3/18/2022

Last updated almost 4 years ago

8 questions

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Question 1

1.

The distance between two charged objects is constant. How does the force between the objects change if the amount of charge on one object is doubled?

The force is two times less

The force does not change

The force is two times more

The force is four times more

Question 2

2.

How does the force between two charged objects change as the objects are brought closer together?

The electrical force gets larger.

The electrical force does not change.

The electrical force gets smaller.

It is not possible to determine without knowing the charges on the objects.

Question 3

3.

The distance between two charged objects is constant. How does the force between the objects change if the amount of charge on both objects is doubled?

The force is two times less

The force does not change

The force is two times more

The force is four times more

Question 4

4.

Two charged objects are placed 0.75-m apart from each other. One sphere is positive and has a charge of +1.8 x 10-6 C and the other charge is negative and has a charge of –4.0 x10-6 C.
Calculate the magnitude of the electrical force between the two spheres.
Be sure to select the response that has the direction of the force as well.

-0.115 N [attraction]

9.60 N [attraction]

-12.8 N [attraction]

8.64 x 1010 N [repulsion]

Question 5

5.

Two charged pith balls are separated by a distance of 0.04 meters. One pith ball has a positive charge of +3 x 10-6 C, and the other pith ball has a positive charge of +5 x 10-6 C. What is the magnitude and direction of the electrical force between two charged particles?

84.4 N [attraction]

3.4 N [repulsion]

84.4 N [repulsion]

3.4 N [attraction]

Question 6

6.

How would the amount of force between the two charges change if the two charges were moved 10x’s (ten times) closer together?

The force would be 100 times greater

The force would be 10 times greater

The force would not change – there is no relationship between force and distance

The force would be 10 times smaller (less)

Question 7

7.

Two charged pith balls are separated by a distance of 0.30 meters. One charge is positive and one charge is negative. Both pith balls have a charge of 4.8 x 10-6 C. What is the magnitude and direction of the electrical force between two charged particles?

– 2.304 N (attractive)

+ 2.304 N (repulsive)

– 9.60 N (attractive)

+ 9.60 N (repulsive)

Question 8

8.

A student brings a positively charged Top Tape (+1.3 x 10-7 C) near a charged rod of PVC. The PVC is brought within 15 cm (0.15 meters) of the Top Tape and it attracts. The force between the PVC and tape is measured to be -2.35 Newtons. What is the charge and sign (+ / –) on the charged PVC?

– 4.52 x 10-5 C

+ 0.452 C

+ 4.52 x 10-5 C

– 3.13 x 10-12 C