P'S' ch 7 Electricity

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P.S. ch 7 Electricity
7.1 Electric Charge

• I. Atoms have -___________ ( charge)
• - ___________ (- charge)
• -______________ ( no charge)
• Usually atoms have protons electrons, no charge
  since they are cancelled out.
• _______________________________________________

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Static electricity - _____________________________
________. II. Law of conservation of charge -
_______________________ __________________________
___________________________ -opposites
attract -like repel III. An electric field
_________________________________ -can work at a
distance, do not need to touch -field exerts
forces to make other electric charges to
move -___________________________________________
___ ____________________________
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IV. Conductor - __________________________________
_ -metals are good conductors, copper, gold,
silver Insulators - ______________________________
________ _________________________________________
______ V. Transferring Electrical Charge -
________________ _________________________________
______ A. Charging by contact -
_________________________ ________________________
_____________________ -eg. Static electricity by
feet rubbing the carpet
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B. Charging by induction - _______________________
________________________________________________
e.g. negatively charged balloon may cause your
sleeve to become positively charged C. Static
Discharge - _____________________________
_____________________________________________ e.g
. lightning - static discharge between the cloud
and the ground Grounding -________________
__________________________ _____________________
_____
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VI. Detecting Electrical Charge - use an
electroscope Pg. 201, 1-5