Module 2 : Electrostatics
Lecture 6 : Quantization Of Charge
 
  By Newton's third law, the force on $Q_1$ due to $Q_2$ is ,
SUPERPOSITION PRINCIPLE
  According to superposition principle, the force on a charge (called the test charge ) due to a collection of charges is equal to the vector sum of forces due to each charge on the test charge . A test charge, by definition, is a charge with infinitisimally small magnitude such that other charges in its vicinity experience negligible force due to it.
  The force on the test charge $Q$due to charges $Q_1, Q_2, \ldots Q_N$is
 
 
  Example-1
  Exercise-1
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