Gr 9_Worksheet Electrical Quantities (Part 1)

All objects have positively charged named _____

• Positron

• Neutrons

• Protons

• Electrons

All objects have negatively charged named _____

• Positron

• Neutrons

• Protons

• Electrons

Every nucleus (except hydrogen) contains uncharged particles called _____

• Positron

• Neutrons

• Protons

• Electrons

Normally, the number of protons and electrons are the same which means the object is _____ overall.

• Positive

• Negative

• Neutral

• Charged

When two objects are rubbed together, the _____ can cause electrons to move from one object onto the other.

This can lead to a build up of _____.

• Charge; Friction

• Friction; Charge

• Friction; Positive

• Charge; Positive

The diagram shows blue-coated balls labelled B and C hanging from threads near each other. Which line identifies the possible charges on B and C?

• B: Neutral

  C: Neutral

• B: Negative

  C: Negative

• B: Negative

  C: Positive

• B: Positive

  C: Negative

Diagram 1 : shows two thin, uncharged strips of plastic.

Diagram 2 : shows the same strips after they have been rubbed with a dry cloth.

Which row describes the charge on the strips after rubbing, and the force between the strips after rubbing?

• charge on strips = opposite

  force between strips = attraction

• charge on strips = opposite

  force between strips = repulsion

• charge on strips = the same

  force between strips = attraction

• charge on strips = the same

  force between strips = repulsion

The diagram shows blue-coated balls labelled A and B hanging from threads near each other. Which line identifies the possible charges on A and B?

• A: Neutral

  B: Neutral

• A: Negative

  B: Negative

• A: Positive

  B: Positive

• A: Positive

  B: Negative

A PVC (plastic) rod is rubbed with a nylon cloth. This process causes electrons to be transferred between the rod and the cloth, causing both objects to become charged.

Which one correctly gives the nature of the charges on both the cloth and the rod, and the effect the objects have on each other after becoming charged?

• Charges on rod and cloth = the same

  Effect = repel

• Charges on rod and cloth = the same

  Effect = attract

• Charges on rod and cloth = opposite

  Effect = repel

• Charges on rod and cloth = opposite

  Effect = attract

Materials that gain electrons will have be _____

• Positively charged

• Negatively charged

• Neutral