An infinite number of charges each equal to 4µC are placed along the X-axis at x1 = 1m, x2 = 2m, x3 = 4m and so on. Find the electric field intensity at the origin due to given set of charges.

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up