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NEET UG PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES

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Infinite charges of magnitude q each are lying at x=1,2,4,8..x = 1,2,4,8.. metre on X-axis. The value of intensity of electric field at point x=0x = 0 due to these charges will be
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Correct option: A
12×109  q  NC−112 \times {10^9}\mathrm{\;}q\mathrm{\;N}{\mathrm{C}^{ - 1}}
Option A (12×109  q  NC−112 \times {10^9}\mathrm{\;}q\mathrm{\;N}{\mathrm{C}^{ - 1}}) is correct because it is the sum of an infinite geometric series representing the electric field due to each charge.

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