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NEET UG PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES

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Suppose we have a large number of indentical particles, very small in size. Any pair of them at 10 cm10 \mathrm{~cm} separation repel with a force of 3×10−10 N3 \times 10^{-10} \mathrm{~N}. If one particle of them is at 10 cm10 \mathrm{~cm} from a group of n\mathrm{n} others, how strongly do you expect it to be repelled?
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Correct option: B
3n×10−10 N3 \mathrm{n} \times 10^{-10} \mathrm{~N}
Option B (3n×10−10N3n \times 10^{-10} N) is correct because the total force is the sum of the individual forces from each of the n particles.

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