9 Introduction to Electricity and Static Electricity

Multiple Choice

Which subatomic particle is negatively charged?

• Proton

• Neutron

• Electron

• Nucleus

Multiple Choice

If an atom has 12 protons and 10 electrons it will be:

• Positively charged

• Negatively charged

• Neutral

Multiple Select

Which of the following are examples of conductors?

• Metals

• Plastics

• Tap water/salt water

• Wood

Multiple Choice

Static electricity is when:

• charged particles are forced to flow around

• charged particles move through a closed circuit

• charged particles are forced to gather in one place

• charged particles gather on metal

Open Ended

A student thinks that an electrical extension cable is made up entirely of plastic, except the metal parts on the end. State:

1. Whether this is a true statement

2. What you think is inside the cable.

3. What is the purpose of the plastic.

Multiple Choice

Which subatomic particle can move from one object to another to build up a static charge?

• Protons

• Neutrons

• Electrons

Open Ended

In this diagram, the balloon has been rubbed against the jumper. Describe how the charged particles have moved to create this arrangement.

Multiple Choice

What happens when two objects with like charges are brought near each other?

• They attract each other

• They repel each other

• They combine to form a neutral object

• Nothing happens

Multiple Choice

Two charged particles attract each other. If the first particle is negatively charged, then the second object is

• Negatively charged

• Positively charged

• Neutral

Open Ended

When a person stands on an insulator and holds onto a Van de Graaf generator, they can have electrons build up on their body. If electrons are building up all over their body, explain why the person's hair can stand up like this image.

Multiple Choice

When a negatively charged object comes close to an uncharged object, what happens to the electrons in the uncharged object?

• They are attracted to the charged object

• They are repelled by the charged object

• They remain unaffected

• They become positively charged

Multiple Choice

The electrons in the balloon have moved electrons in the wall away from the edge of the wall, making the wall positively charged in that small area. Now the balloon and the wall are:

• attracted to each other

• repulsive of each other

• have no effect on each other

Open Ended

The balloon is charged and is brought near the stream of water. Explain why the water stream changes its direction of flow.