Chapter-18 Electric Forces and Electric Fields

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Presentation transcript:

Chapter-18 Electric Forces and Electric Fields

Electric Forces and Electric Fields

Atom Atomic Particle Charge Mass Electron –1.6  10-19 C 9.11  10-31 Kg Proton +1.6  10-19 C 1.673  10-27 Kg Neutron 1.675  10-27 Kg

Charging Ebonite Rod & Fur

Charging an Object Ebonite rod & Fur  Negatively charged ebonite rod Glass rod & Silk  Positively charged glass rod

LAW OF CONSERVATION OF ELECTRIC CHARGE During any process, the net electric charge of an isolated system remains constant (is conserved).

Like charges repel and unlike charges attract each other.

How Electronic Ink Will Work http://www.howstuffworks.com/e-ink.html

18.3. Conductors and Insulators Substances that readily conduct electric charge are called electrical conductors. Conductors have free electrons, which conduct the electricity. Examples: Metals such as copper, aluminum, silver, and gold. Materials that conduct electric charge poorly are known as electrical insulators. Examples: Rubber, plastics, and wood.

18.4 Charging by Contact and by Induction An object can be charged by two methods: -By contact. -By induction.

Charging By Contact

Charging By Induction