Form 3 Science Chapter 7 Worksheet [PDF]

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Form  3  Science  –  Chapter  7  :  Unit  7.1  (Electrostatics)    



  1.



Examples of charges obtained when 2 objects are rubbed against each other. Positively charged



Negatively charged



Positively charged



Acetate



Nylon



Glass



Silk



Fur



Wool



Negatively charged



2. Aim



To detect static electrical charges with an electoscope Procedure Observation Explanation 1. Bring an uncharged plastic ruler near the metal cap of an uncharged electroscope. The gold leaf of the There is no movement of electroscope __________________ in _________________________ the elctroscope _________________________



2. Bring a positively charged plastic ruler near the metal cap of an uncharged electroscope.



The positively charged ruler attracts ___________________ to The gold leaf of the electroscope ______________________



the metal cap, leaving _______________________ on the gold leaf and metal plate. The like positive charges _____________ each other.



3. Bring a negatively charged plastic ruler near the metal cap of an uncharged electroscope.



The gold leaf of the electroscope ______________________



Conclusion



The negatively charged ruler repels __________________ from the metal cap down to the gold leaf and the metal plate. The negative charges on the gold leaf and the metal plate _____________ each other



A charged object ___________________ the gold leaf of an uncharged electroscope when it is brought near the metal cap of the electroscope.



Form  3  Worksheet  Unit  7.1  prepared  by  Ms  Sue    



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