Electromagnetism equations

Electromagnetism equations

1. ·

   • Equation to calculate the force between two charges
   • F is measured in N and will have magnitude & direction
   • It is important to remember that like charges attract and unlike charges repel
   • Do not include + and - signs for charges in the equation

2. ·

   • Equation for Electric Field strength around a point of charge
   • The electric field strength is the force experienced by a unit of positive charge (+1C) at a specified distance(r) from a point of charge
   • E is measured in N/C

3. ·

   • Equation to calculate electrical potential at a point
   • Electrical potential is the work done in moving a unit positive charge from infinity to that point
   • Include + and - signs for the charges in the equation

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