Chpt 16 Static Electricity Shen Yulan, 4Sci3

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Chpt 16 Static Electricity Shen Yulan, 4Sci3 by Mind Map: Chpt 16 Static Electricity Shen Yulan, 4Sci3

1. Charging

1.1. Rubbing

1.1.1. The atom that loses an electron is a positive ion while the atom that gains an electron is a negative ion.

1.1.2. Charging an object through the process of rubbing. When an object is rubbed, electrons from one object will transfer to the other object, charging it.

1.2. Induction

1.2.1. The process of producing electric charge on the surface of a conductor under the influence of an electric field.

1.2.2. Earthing process

1.2.2.1. Electrons taken from the earth and flows to the conductor.

1.2.2.2. Electrons are repelled to the earth from the conductor.

2. Charges

2.1. Types of charge

2.1.1. Positive

2.1.2. Negative

2.2. Law of charges

2.2.1. Like charges repel

2.2.2. Unlike charges attract

2.3. SI unit

2.3.1. Coulomb(C)

2.3.1.1. 6.24*10^18 e = 1C

2.3.1.2. 1.602*10^-19 C = 1e

3. Hazards and Applications of Electrostatics

3.1. Electrostatic Hazards

3.1.1. Causes fire due to build up of electrons in an object

3.2. Applications

3.2.1. Conductive strip at the back of trucks containing flammable items

3.2.2. Photocopier

3.2.3. Laser printer

3.2.4. Electrostatic paint spraying

3.2.5. Electrostatic precipator

4. Electric field

4.1. It is a region in which an electic charge experiences a force.

4.2. Electric field lines

4.2.1. Path a positive charge would take if it is free to move