Electricity and Magnetism

A material that allows the free flow of electric charges.

• Conductor

• Insulator

• Semiconductor

Describe one way you can make an electromagnet stronger.

• Reduce the size of the iron core

• Decrease the current

• Decrease the energy source

• Increase the number of loops in the wire

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The magnetic field is strongest at

• the north pole only

• in the middle

• at both poles

• at the south pole only

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Which direction will the electricity travel?

• Neutral to positive

• Positive to negative

• Negative to positive

• Neutral to negative

What is a circuit?

• The buildup of electric charges

• A complete, closed path through which electric charges flow

• Opposition to the flow of charge

• Electric potential

An iron nail wrapped with copper wire and attached to a battery makes —

• Permanent magnet

• Electromagnet

• Compass

• Metal magnet

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How do objects become negatively charged?

• They gain electrons

• They lose electrons

• Rubbing or Friction

How do objects become positively charged?

• They gain electrons

• They lose electrons

• Rubbing or Friction

This is a measure of electrical pressure

• Current

• Volt

• Ohm

• Ampere

As the distance between magnets increases-the attraction between them will

• Decrease

• Stay the Same

• Increase

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