Unit 3 Test Woksheet

Question 1

The charge on the electron and proton are ____ & ____.

Answer 1

negative and positive

Question 2

A neutral solid object is rubbed with wool and becomes positively charged. What statement describes the transfer of charge?

Answer 2

Electrons are transferred from the object on to the wool

Question 3

Both AA and AAA batteries have a 1.5 V potential difference across their terminals. How is it possible for them to have different amounts of electrical potential energy?

Answer 3

They can have separate different amounts of charge

Question 4

What does the load do in an electric circuit?

Answer 4

Transforms electrical energy into other forms of energy

Question 5

Give an example of an insulator.

Answer 5

Plastic

Question 6

Give an example of a conductor.

Answer 6

Metal

Question 7

Increasing the charge on one object ____ the force between the two charged objects.

Answer 7

Increases

Question 8

Increasing the distance between two objects ____ the force between the two charged objects.

Answer 8

Decreases

Question 9

Decreasing the distance between the two objects ____ the force between the two charged objects.

Answer 9

Increases

Question 10

The amount of electric energy stored in charge depends on what two factors?

Answer 10

Voltage and amount of charge

Question 11

What combination of materials could be used to produce the best electrochemical cell?

Answer 11

An aluminum electrode, a copper electrode and an acidic solution

Question 12

What is conventional current?

Answer 12

The flow of charge from positive to negative

Question 13

An electric device that slows down current and changes electrical energy into other forms is called a ____.

Answer 13

Resistor