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**An infinite number of charges, each equal to 4C, are placed along the x-axis at x = 1 m, x = 2 m, x = 4 m, x = 8 m and so on. The total force on a charge of 1C placed at the origin is**

**a)****48 × 10**^{8}N**b)****4.8 × 10**^{9}N**c)****48 × 10**^{4}N**d)****4.8 × 10**^{10}N

U just need to add the distance using Gp. formula ...............a/1-r ........................a= 1......&......r = 1/4.............

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