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Electricity 

7.1  Electricity                
 
ENERGY
  • Energy means the ability to do work
  • The S.I.unit for energy is joule (J)
Forms of energy
  1. Sound energy
  2. Kinetic energy
  3. Electrical energy
  4. Gravitational potential energy
  5. Elastic potential energy
  6. Light energy
  7. Nuclear energy
  8. Heat energy
  9. Chemical energy
Sources of energy
  1. The Sun
  2. Geothermal
  3. Water
  4. Biomass
  5. Fossil fuel
  6. Radioactive substances
  7. Wave
  8. Wind
Electrostatic Charges
 
  • Electric charges consist of positive charges and negative charges
  • The repulsion among these charges are called electrostatic forces 
  • Electroscope is used to detect the existence of electric charges on an object
Electric current
\(\downarrow\)
Electric current can be defined as the rate of flow of electric charges through a conductor
Current, Voltage and Resistance
 
  • S.I unit for electric current is ampere(A) - measured by ammeter
  • The voltage is the potential difference between two points, volt(V) - measured by voltmeter
  • The unit for measuring resistance is ohm (Ω)
  • The relationship between current, voltage and resistance is Ohm's Law
\(V=IR\)

 
The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of pandai.

Electricity 

7.1  Electricity                
 
ENERGY
  • Energy means the ability to do work
  • The S.I.unit for energy is joule (J)
Forms of energy
  1. Sound energy
  2. Kinetic energy
  3. Electrical energy
  4. Gravitational potential energy
  5. Elastic potential energy
  6. Light energy
  7. Nuclear energy
  8. Heat energy
  9. Chemical energy
Sources of energy
  1. The Sun
  2. Geothermal
  3. Water
  4. Biomass
  5. Fossil fuel
  6. Radioactive substances
  7. Wave
  8. Wind
Electrostatic Charges
 
  • Electric charges consist of positive charges and negative charges
  • The repulsion among these charges are called electrostatic forces 
  • Electroscope is used to detect the existence of electric charges on an object
Electric current
\(\downarrow\)
Electric current can be defined as the rate of flow of electric charges through a conductor
Current, Voltage and Resistance
 
  • S.I unit for electric current is ampere(A) - measured by ammeter
  • The voltage is the potential difference between two points, volt(V) - measured by voltmeter
  • The unit for measuring resistance is ohm (Ω)
  • The relationship between current, voltage and resistance is Ohm's Law
\(V=IR\)

 
The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of pandai.
Chapter : Electricity and Magnetism
Topic : Electricity
Form 2 Science
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