Electric Force

Protons have a ______ charge.

• positive

• negative

• neutral

Charged objects can be attracted to:

• Neutral objects 
• Objects with the opposite charge
• Both

The transfer of which atomic particle is responsible for the static charges on objects?

• neutrons
• protons
• electrons
• none of these

What pair of charges repel?

• Positive and Positive
• Positive and Neutral
• Negative and Neutral
• Neutral and Neutral

What method of charging is walking across carpet?

• friction.
• induction.
• contact.
• static electricity

The closer two charged particles are, the ___________ the force between them

• closer
• further
• stronger
• weaker

When you walk across a carpet in socks, they pick up charges. Later, those extra charges in your socks aren't there. What happened to the charges?

• The charges disappeared.

• The charges switched signs.

• The charges transferred to another object.

• The charges broke apart into smaller particles.

The first pair of charges (A and B) are 10 cm apart. A has a +1 charge and B has a -1 charge.

The second pair of charges (C and D) are 10 cm apart. C has a +2 charge, and D has a -3 charge.

The third pair of charges (E and F) are 12 cm apart. E has a -2 charge, and F has a -2 charge.

Which of these statements is true?

• E and F have the strongest electric force because they are farther apart.

• E and F have the strongest repulsion because they are both negatively charged.

• C and D have the strongest repulsion because the differential of their charges is greatest.

• The chargest of A and B cancel each other out, so there is no electric force between them.

What happens to the electric force between the objects when you increase the distance between a positively charged object and a negatively charged object? (Everything else remains constant.)

• The electric force decreases.

• The electric force increases.

• The electric force remains constant.

• There is not enough information to answer the question.

What is an electric charge?

• A physical property that results in static electricity.

• The attraction and repulsion of objects.

• Something you plug in.

• The flow of electrons on a wire.