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Superposition principle (basic)


Three charges Q1, Q2 and Q3 placed in a straight line are shown below.
The magnitude of electric field at the point P due to Q1 alone is E1. Similarly, the magnitude of electric field at P due to Q2 and Q3 individually is E2 and E3 respectively.
Which of these best represents the net electric field at P due to all three charges? Note: Take electric field towards right to be positive.
Choose 1 answer: