Practice Test

Question 1

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?

Revolt · Accepted Answer

A: It will decrease to one-ninth the original force.

Question 2

Which is a dopant for a semiconductor that conducts electricity due to the movement of electrons?

Revolt · Accepted Answer

A: antimony

Question 3

Which material is used as a dielectric?

Revolt · Accepted Answer

B: glass

Question 4

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.

Revolt · Accepted Answer

D: X delivered  6 point 3 cap c  more than Y.

Question 5

A negative point charge, q , is placed near a positive charge, cap q The distance between the charges increases as q is moved farther from cap q Which quantity will decrease as q is moved away?

Revolt · Accepted Answer

D: electric potential

Question 6

A power source of 2 point 0 cap v is attached to the ends of a capacitor. The capacitance is 4 point 0 µF What is the amount of charge stored in this capacitor?

Revolt · Accepted Answer

A: 8 point 0 µC

Question 7

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?

Revolt · Accepted Answer

A: Electric fields are inversely proportional to the square of the distance, so any change in position changes the field.

Question 8

Based on the locations of the elements aluminum Al , silicon Si , and phosphorus (​P​) on the periodic table, which lists the elements in order from the least conductive to the most conductive?

Revolt · Accepted Answer

D: cap p ,  Si ,  Al

Question 9

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?

Revolt · Accepted Answer

D: same force, but in the opposite direction

Question 10

What are used to transfer electrical energy from a power plant all the way to a home?

Revolt · Accepted Answer

B: power lines

Practice Test Answers

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