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Practice Test Answers

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1
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Which change will correct the error on her note card?

A
adding the title Parallel Circuits
B
moving point (4) into the Advantages column
C
switching the headings on the columns
D
moving point (2) into the Advantages column
3

Which label belongs in the region marked X?

A
Electrons move
B
Charged object must not touch
C
Charged object must touch
D
Protons move
4

Which labels belong in the regions marked X and Y?

A
X: Uses uranium Y: Uses falling water to turn turbines
B
X: Boils water to form steam Y: Uses turbines to turn generators
C
X: Uses turbines to turn generators Y: Boils water to form steam
D
X: Uses generators to produce electrical energy Y: Burns fuel to form steam
5

How can the negative charge be moved in order to cause both charges to have the same change in electric potential energy?

A
It can be moved 0 point 0 4 m toward the positive plate.
B
It can be moved 0 point 0 4 m toward the negative plate.
C
It can be moved 0 point 0 1 m toward the negative plate.
D
It can be moved 0 point 0 1 m toward the positive plate.
6

What are the correct labels for the image?

A
W: Negative X: Negative
B
W: Negative X: Positive
C
W: Positive X: Negative
D
W: Positive X: Positive
8

If the distance between two charges is increased to three times the original distance, how will the electrical force between the charges compare with the original force?

A
It will increase to nine times the original force.
B
It will increase to three times the original force.
C
It will decrease to one-third the original force.
D
It will decrease to one-ninth the original force.
10

Charges of plus 3 µC and negative 5 µC are 2 mm from each other. The negative 5 µC charge is replaced with a plus 5 µC charge. How will the electrical force between the charges compare with the original force?

A
same force, but in the opposite direction
B
greater force, but in the same direction
C
same force, but in the same direction
D
greater force, but in the opposite direction
12

Which current delivered more charge, and how much more charge did it deliver? Current X is 2 point 5 cap A and runs for 39 seconds. Current Y is 3 point 8 cap A and runs for 24 seconds.

A
X delivered 6 point 3 cap c more than Y.
B
X delivered 97 point 5 cap c more than Y.
C
Y delivered 1 point 3 cap c more than X.
D
Y delivered 91 point 2 cap c more than X.
14

A point charge is used to determine the electric field around a charged particle. Why is it necessary that the point charge does not affect the position of the charge being tested?

A
Electric fields are inversely proportional to the square of the distance, so any change in position changes the field.
B
The amount of charge will increase if the charged particle moves closer to the point charge, so any change in position changes the field.
C
Electric fields are directly proportional to distance, so any change in position changes the field.
D
The amount of charge will decrease if the charged particle moves closer to the point charge, so any change in position changes the field.
15

Which basic feature is missing from the circuit?

A
conducting wires
B
a device that uses energy
C
a switch
D
an energy source
16

Which labels belong in regions X, Y, and Z?

A
X: Points toward the charge Y: Points in the direction of the force on the negative charge Z: Points away from the charge
B
X: Points toward the charge Y: Points in the direction of the force on the positive charge Z: Points away from the charge
C
X: Points away from the charge Y: Points in the direction of the force on the positive charge Z: Points toward the charge
D
X: Points away from the charge Y: Points in the direction of the force on the negative charge Z: Points toward the charge

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