Magnetism Exam
Draw the magnetic fields of the magnets below.

 

N S N S
 
 

Why canít you separate the magnetic north pole from the magnetic south pole?  What will happen if you cut the magnet?
 
 
 

Illustrate how a magnetic field can be traced using a compass.
 
 
 
 
 

Use a drawing to explain the right hand rule.  Label both the current and the magnetic field.
 
 
 
 
 

Give three examples of technologies that use electromagnets.
 
 
 

Name two advantages of an electromagnet over a regular magnet.
 
 

Draw the direction of the magnetic fields in the domains of the following materials:

Nonmagnetic:Magnetic:
 
 
 
 

What does each of the following do in an electric motor:
brushes

commutator
 

Describe (in words) how a speaker works.
 
 
 

Explain how a power plant produces electricity through electromagnetic induction.  Be specific.
 
 
 
 

Diagram how current changes as a loop rotates through a magnetic field.
 
 
 

Why are step-down transformers required between the power lines and your house?
 
 
 

Describe at least two ways you can test to see if an object is magnetic.
 
 
 


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