Test - Unit 8 Electricity and Magnetism
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43.Explain how lightning is create.Included which type of electric charge transfer it is.
The movement of clouds cause a build up of static electricity.When electrons build up enough it induces a positive charge on earth, eventually the attract pick him so great that electrons go to earth to neutralize it, this is called static discharge U8C1P5
44.Explain how a better works.
A chemical reaction causes a voltage difference between the positive and negative terminals. When connected, this push is current through wire due to voltage different. The electrons flow from the negative into the positive end. U8C2P7
• Explain ferromagnetism. Make sure to include what is happening to the electrons in the atoms. You may draw a picture if that helps.
When lawn magnetic objects are placed in a strong enough magnetic field and become magnetized to the polls within their items of lining, all the electrons are in the same direction. U8C4P25
Which of the following will increase the resistance of a wire? Using a shorter wire Using silver instead of copper Using a thicker/wider wire Increasing the temperature of the wire
Increasing the temperature of the wire U8C2P8
Which of the following would increase the strength of the magnetic field around the wire. Using less loops around the iron core Using a larger iron core Flipping the direction of the current flowing through the wire Increasing the current flowing through the wire
Using less loops around the iron core U8C4P24