## Magnitude of a point charge, Physics

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a) Two charges of the value 15X10-9 coulomb and 30X10-9coulomb are locate at a distance 6 cm. Determine the intensity of electric field at point which is at a distance 2 cm from the first and 4cm from the second respectively.

b) What is the magnitude of a point charge so that the electric field 50 cm away has a magnitude 2.0 N/C?

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