Science 10F Cluster 3 Nature of Electricity

A neutral object has exactly the same number of

• protons and neutrons
• protons and electrons
• neutrons and electrons
• protons, neutrons, and electrons

Use the diagram to answer the question. What is the electric charge on the object shown below?

• Neutral
• Positive
• Negative
• It is impossible to tell

Use the diagram to answer the questions. What is the electric charge on the object shown below?

• Neutral
• Positive
• Negative
• It is impossible to tell

Which of the following describes the object shown in the illustration?

• It lost protons.
• It lost electrons.
• It gained protons.
• It gained electrons.

A vinyl rod is rubbed with a cotton cloth. The vinyl rod becomes negatively charged and the cotton cloth becomes positively charged. Which of the following describes the cotton cloth?

• It has gained electrons
• It has more electrons than protons.
• It has more protons than electrons.
• It has the same number of protons as electrons.

Which of the following is a good conductor?

• Glass
• Wood
• Copper
• fur

A negatively charged ruler is brought near a suspended ball. The ball is repelled by the ruler. What can you conclude from this observation?

• The ball is neutral.
• The ball is positively charged.
• The ball is negatively charged.
• The ball is either neutral or positively charged.

Two suspended balloons repel each other when brought close together. What can you conclude about the balloons?

• They have opposite charges.
• They both have the same charge.
• One balloon is neutral, and the other balloon is positively charged.
• One balloon is neutral and the other balloon is negatively charged.

How does the electric force change as the amount of charge is increased?

• It increases.
• It decreases.
• It stays the same.
• It increases and then decreases.

Which of the following statements is true about the relationship between distance and electric force?

• If the distance between charged objects decreases, the electric force decreases.
• If the distance between charged objects decreases, the electric force stays the same.
• If the distance between charged objects increases, the electric force increases.
• If the distance between charged objects increases, the electric force decreases.