Analysing Electricity Fields and Charge Flow ( Physics)

• Analysing Electric Fields and Charge Flow from Tuisyen Geliga

   

   

  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.

 

 

Van De Graaff generator

 

A Van de Graaff generator is an electrostatic generator which uses a moving belt to accumulate very high amounts of electrical potential on a hollow metal globe on the top of the stand. While the belt is running a very large concentration of charges can be built up. Essentially, a Van de Graaff generator operates by transferring electric charge from a moving belt to a terminal.

First invented in 1929, by American physicist Robert J. Van de Graaff in 1929.the Van de Graaff generator became a source of high voltage for accelerating subatomic particles to high speeds, making it a useful tool for fundamental physics research.

The potential difference achieved in modern Van de Graaff generators can reach 5 megavolts. A tabletop version can produce on the order of 100,000 volts and can store enough energy to produce a visible spark.

Schematic view of a classical Van de Graaff-generator.
1) hollow metal sphere
2) upper electrode
3) upper roller (for example an acrylic glass)
4) side of the belt with positive charges
5) opposite side of the belt with negative charges
6) lower roller (metal)
7) lower electrode (ground)
8) spherical device with negative charges, used to discharge the main sphere
9) spark produced by the difference of potentials

ELECTRIC FIELD

• Electric field is a region where a charge experiences electrical force.
• Lines of force are used to represent the direction of an electric field.

Electric Field Pattern Experiment

or here http://www.youtube.com/watch?v=KAaMWfik70g

COOL EXPERIMENTS: THE EFFECTS OF AN ELECTRIC FIELD ON A CHARGE

ELECTRIC FIELD AND TENNIS BALL EXPERIMENT

ELECTRIC FIELD AND CANDLE FLAME EXPERIMENT