Thursday
April 2, 2015

Homework Help: Physical Science

Posted by mysterychicken on Monday, May 11, 2009 at 10:41am.

Need help with these questions-

1.What causes an electric current in a wire?
A.Electric feilds cause atoms to move in the wire
B.Electrons flow because of electrical attraction and repulsion
C.Electrons move because of heat
D.Electrons build up in the wire and create a charge
B?

2.How does an insulator stop the flow of an electrical current?
A.Insulators have too many electrons
B.Insulators have a positive charge so they absorb electrons
C.Electrons in an insulator don't move readily
D.Insulators convert electric energy into other forms of energy
???

Thanks!
-MC

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