Types of Forces

If you have two particles at a certain close distance, what happens if the charge on one particle is increased?

• The force between the particles will decrease.

• The force between the particles will increase.

• Charged particles are not affected by the charges of other particles.

• The force between the particles will stay the same.

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How will a positive charge interact with a negative charge?

• The charges will repel.

• The charges will ionize.

• The charges will attract.

• The charges will absorb.

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One student rubs a balloon against his hair several times. Another student passes a comb through her hair several times. The students place the comb near the balloon and observe that the comb repels the balloon. Which is the most likely reason the comb is able to repel the balloon?

• The balloon and the comb have opposite electrical charges.

• The balloon has a negative charge and the comb is neutral.

• The balloon and the comb have the same electrical charge.

• The balloon has a positive charge and the comb is neutral.

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Marty rubbed a balloon on his shirt. The balloon was then able to stick to the wall of the room. Which picture best represents the charges of the particles on the balloon and the wall that cause the balloon to be attracted to the wall?

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When Mandy took clothes out of a dryer, she observed that a sock was clinging to a shirt. Which situation could cause the sock to be attracted to the shirt?

• The sock has a small positive charge while the shirt has a large positive charge.

• The sock has a small positive charge but the shirt has a small negative charge.

• Both the sock and shirt have small negative charges.

• Both the sock and shirt have large positive charges.

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Two electrically opposite charges are separated by a fixed distance. Which action will provide the greatest increase in the force of attraction between the charges?

• Double each charge and double the distance between the charges.

• Double each charge and halve the distance between the charges.

• Halve each charge and halve the distance between the charges.

• Halve each charge and double the distance between the charges.

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How will a negative charge interact with a negative charge?

• A negative charge will ionize another negative charge.

• A negative charge will repel another negative charge.

• A negative charge will attract another negative charge

• A negative charge will absorb another negative charge.

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The image shows two positively charged particles placed at different distances from each other. Which set of charged particles is likely to experience a greater force? Assume distance is the only difference between the sets.

• Set B.

• They are both the same.

• There is not enough information.

• Set A.

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What is a property of a magnet?

• It attracts or repels other magnets.

• It attracts or repels any object with mass.

• It attracts or repels any metal.

• It affects electrically charged particles.

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Which would be true of a bar magnet?

• The bar has a uniform strength throughout.

• The two ends of the magnet are called poles.

• The magnet would be strongest at its two edges.

• The two ends of the magnet are positively or negatively charged.