# Electric Fields

Unit 4 Physics Edexcel

2.1 Electrical and Magnetic Fields

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• Created by: Craig
• Created on: 06-10-10 10:55

## Coulombs Law

• Any object carrying a charge will experience a force when in the presence of another body also carrying a charge
• This force is given by Coulomb's Law
• The formula is:

The value of the constant is 8.99 x 10^9

Coulomb's law follows the inverse square law

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## Difference betwwen electrical field strength and e

• Electric Field Strength is defined as the force per unit charge experienced by a test charge at that point
• The Electric Potential at a point in an electric field is defined as the work done in bringing a test unit positive charge from infinity to that point.
• The potential charge at infinity is always defined to be zero.
• Electric Field Strength is a vector quanitity and Electric Potential is a scalar quantity.
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## Equipotentials

• In an electric field, you have areas were the electrical potential are the same
• These areas can be connected by lines called equipotentials

• The closer these lines are, the stronger the field. The further the lines the weaker the field.
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## Difference Between Radical and Uniform feilds

• Uniform Fields have the same electical field strength.
• Radical Fields have different electical field strenths.
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