Gravity, Electricity, and Magnetism

Which diagram correctly represents the direction of the magnetic field around a bar magnet?

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Two magnets move away from each other. What happens to the magnetic attraction between them as they become further apart?

• It decreases

• it increases

• it becomes zero

• it does not change

A magnet sticks to a table leg. Based on this information, which material could the table leg be made of?

• Iron

• wood

• copper

• aluminium

Which of the circuits shown below will make both light bulbs glow?

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Two negatively charged particles are 1 millimeter apart. The electric force between them is 20 Newtons. How will the amount of electric force between the particles change if the particles move closer together

• force will increase

• force will decrease

• force will stay the same

• force will disappear

When two neutral materials are rubbed together, there is a transfer of electrical charge from one material to the other. The total electrical charge for the system _________________

• Increases as electrons are transferred

• Increases as protons are transferred

• Remains constant (unchanged) as protons are transferred

• Remains constant (unchanged) as electrons are transferred

An inflated balloon which has been rubbed against a person's hair is touched to a neutral wall and remains attracted to it. Which diagram best represents the charge distribution on the balloon and wall?

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Which of the following statements about gravitational fields is true?

• Gravitational fields affect objects only when two objects are touching.

• Gravitational fields affect objects only if the objects are not in contact.

• Any object that has mass is surrounded by a gravitational field: including a speck of dust, a human body, a paperclip, AND planets.

• Only very massive objects, such as Earth, are surrounded by a gravitational field.

If two objects move away from each other. What happens to the gravitational attraction between them?

• it decreases

• it increases

• it becomes equal to zero

• it does not change

Which diagram best represents the gravitational field lines surrounding the Earth

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