Static electricity
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Protons and neutron are collectively called nucleons
Types of charges
○ Positive +
○ Negative -
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Opposite charges attract each other while same charges repel each other
Law of charges
○ Like charges repel each other
○ Unlike charges attract each other
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An object is grounded when connected to the earth through a connecting wire
Object loses all its charge
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Symbol for grounding - ⏚
● Methods of charging a body
○ Friction
○ Conduction
○ Induction
● Charging by friction
○ When insulators are rubbed together, one gives up electrons and becomes positive
charged while the other gains electrons and becomes negatively charged
○ E.g the laundry from the dryer that sticks together
● Materials that gain a positive charge
○ Dry human skin
○ Leather
○ Human hair, cat fur
○ Nylon
○ Glass
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