Question

An infinite no.of electric charges each equal to 5 nano coulombs are placed along X-axis at x = 1 cm, x = 2cm, x = 4cm, x=8cm,…. and so on. In this setup, if the consecutive charges have opposite sign, then the electric field in newton/coulomb at x = 0 is 

1) 12× 10⁴ 

2) 24× 10⁴ 

3) 36× 10⁴ 

4) 48× 10⁴ 

Answer 1

Correct Option : 3

Explanation :

E = Resultant electric field =  E₁+E₂+E₃+ .....