Electricity and Magnetism

The measure of how much a material opposes the flow of electricity

• Electromagnet

• resistance

• static electricity

The buildup of charges on an object

• electromagnet

• resistance

• static electricity

A temporary magnet made up of a wire wrapped around a core

• Electromagnet

• resistance

• static electricity

What is a property of matter that causes objects to attract or repel each other?

• compass

• electric circuit

• electric charge

• electric field

An object in which negative charges can easily pass through and conduct electricity

is an object in which negative charges can not easily pass through and does not conduct electricity

Which is a characteristic of most electricity conductors?

• They can be cut easily

• positive charges move easily through them

• they are soft and felxible

• negative charges move easily through them

Which statement is true about an electromagnet?

• it is a permanent magnet

• increasing the number of coils decreases its strength

• It cannot be turned off

• it is made by wrapping current-carrying wire around an iron core.

Which of these materials makes a good insulator of electricity?

• Plastics

• Aluminum foil

• salt water

• silver

If one burned out bulb causes all of the lights to fail in a circuit, what might conclude?

• it is a parallel circuit

• it is a series circuit

• more batteries are needed

• a heavier wire is needed