Electricity and Magnetism Study Guide

Two oppositely-charged objects are attracted to one another. What happens when you double the magnitude of an object's charge?

• the force will double

• the force will be cut in half

• the force will stay the same

• the objects will start to repel one another

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What happens when you increase the distance between two charged objects?

• The force will increase

• The force will decrease

• The force will stay the same

• The force will quadruple

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Force has a(n) _________ relationship to the distance between two charged objects.

• direct

• inverse

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Two positively-charged objects will _________.

• attract

• repel

• double in magnitude

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Two objects that have the opposite charge will ________.

• attract

• repel

• quadruple in size

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Which forces are capable of acting on objects at a distance?

• Electric fields

• Magnetic fields

• Gravitational fields

• All of the above

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The measure of "push or pull" between two charged or magnetic objects is the _________.

• force

• gravitation

• electrons

• Coulombs

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____________ are substances that hold onto electrons very tightly.

• Charged objects

• Conductors

• Magnetic fields

• Insulators

What produces the Earth's magnetic field?

• A giant bar magnet embedded in the mantle

• The Sun's radiation

• Compasses at the North and South poles

• The constant movement of molten magnetic material in its core

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Which of the following is NOT TRUE about electrons?

• They are able to move through conductors

• They repel each other

• They are attracted to positive charges

• They are positively-charged

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