Monday, March 14, 2011

Physics Form 5: Chapter 2 - Electric Charge

  • There are two types of electric charge namely positive charge and negative charge.
  • Like charge repel each other.
  • Unlike charge attract each other
  • Unit of charge is Coulomb, C.
  •  Electric field is a region where a charge experiences electrical force.
  • Lines of force are used to represent the direction of an electric field.

Candle in the electric field
  • Heat energy from the candle flame produces ionization of air molecules to form positive and negative ions.
  • Movement of positive ions which are heavier towards the negative plate causes a bigger spread of the flame.
  • Negative ions which are lighter move towards the positive plate and causing a smaller spread of the flame.

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