StaticPracticeQuestions
SNC1D
1. You rub a neutral object with a piece of wool. Some of its electrons are transferred to the wool. Is the
object now neutral, negatively charged, or positively charged? How do you know?
2. Explain why this statement is false: “A neutral object contains no charge.”
3. The following observations are made of three objects A, B, and C. A is repelled by a positively charged
object. A attracts B but repels C. The force between C and B is attraction. What are the possible charges
on each object?
4. The following observations are made of four objects A, B, C, and D. A attracts both B and D but is
repelled by a negatively charged object. The force between C and D is repulsion. What are the possible
charges on each object?
5. An object is brought near (but not touching) a charged pith ball. What are the possible outcomes if the
object is:
(a) similarly charged
(b) oppositely charged
(c) neutral
6. Assume that an object is brought near (but not touching) a neutral pith ball. What are the possible
outcomes if the object is:
(a) positively charged
(b) negatively charged
(c) neutral
7. What would change about the way an electroscope worked if its metal knob were replaced with a
plastic knob?
8. a) Why do the leaves of a positively charged electroscope move farther apart if a rod with the same
charge is brought near?
b) Why would the leaves move closer together if the rod had the opposite charge to the electroscope?
9.Sometimes, finished photocopied paper will stick to you. Explain why.
10. Advertisers use static-cling vinyl film for brightly coloured removable signs, decals, and stickers like
the one shown. The windows of many homes, office buildings, and cars are covered with filters that
screen out sunlight. These screens use static electricity to cling to the window.
Explain why it is not a good idea to try to
put up static-cling decals on a very humid
day.