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Rev. Notes > IGCSE > Elecrical Quantities
Previous Topic Elecrical Quantities Next Topic

Electric charge One Coulomb Charge Production of electric charge
Detection of electric charge Experiment to detect the electric charge Electrical conductors and insulators
Electric field Electrostatic forces Application of electrostatic forces
Electric current One Ampere of electric current Direction of electric current
Basic relation of electric current Direct current Alternating current
Ammeter Electromotive force - (e.m.f.) Potential difference
One Volt Explanation of potential difference Measurement of potential difference
Voltmeter Resistance Affect of length of the conductor on resistance
Affect of cross-sectional area on resistance Affect of temeprature on resistance How nature of material affects the eresistance
Ohm's law Potential difference - Current graph for Ohmic conductors Potential difference - Current graph for tungsten filament
Potential difference - Current graph for semiconductor diode Electrical energy Formula for electrical energy
Electrical Power Formulae for electrical power

Electric field

Every electron and proton produces an electric field. So arround any object in which charges are not balanced, there is an electric field. Electric field can be defined as " the region arround the charge where the force of attraction or repulsion can be observed by another test charge".

The strength of the force depends upon the following two factors.

1- how close the particles are:the closer they are, the larger the force

2- how much electric charge they carry: the more charge, the larger the force

Direction of electric field: In case of positive charge, the direction of electric field is always radially outward, while in case of negative charge, the direction of electric field is always radially inward. If two opposite static charges are close to each other, then electric field between between them will be positive charge to the negative charge.





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View Comments on this Chapter - Total Comments (6)
sree Said :
wish these had a diagrams
  24/12/15 10:01 AM
student 567 Said :
There are no diagrams, but seeing that you don't give a shit... why should i bother to comment?! Can you just put the dam diagram up already!
  18/04/14 08:10 PM
Deepak varun Said :
there is a spelling mistake to say said they said asaid please change it admin
  17/11/13 06:26 AM
gargi sachdev Said :
diagrams aren't there ...
  29/08/12 12:35 AM
gargi sachdev Said :
diagrams aren't there ...
  29/08/12 12:35 AM
Ajay Said :
I cant see any diagrams? can u help me with it
------------------------------------------------------------------------------------- Admin Replied:

Hi Ajay, thank you for informing us about this issue. We will make sure we make those images available for you as soon as possible.

Thank you

  15/03/12 12:13 PM


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