Question

# A charge ${\mathrm{q}}_{1}$ exerts some force on a second charge ${\mathrm{q}}_{2}$. If a third charge ${\mathrm{q}}_{3}$ is bought near, the force of ${\mathrm{q}}_{1}$ exerted on ${\mathrm{q}}_{2}$:

A

decreases

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B

increases

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C

remains unchanged

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D

increases if ${\mathrm{q}}_{3}$ is of same sign as ${\mathrm{q}}_{1}$ and decreases if ${\mathrm{q}}_{3}$ is of opposite sign

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Solution

## The correct option is C remains unchanged Explanations of correct option: (C)Superposition principle:It is also known as the superposition property.It describes that, if the two or more waves in space overlap each other, then the result of the disturbance is equal to the algebraic sum of the individual disturbance.A diagram to represent the superposition principle:On the basis of the superposition principle, The force between any two charged particles is independent of all other charges in the universe.So, the force q1 or q2 is not affected by q3.Therefore, the resultant force on q2 will be affected.

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