An ionfinite number of charges each q are placed in the x-axis at distances of 1,2,4,8 meter from the origin. If the charges are alternately positive and negative find the intensity of electric field at origin.

An infinite number of charges each of magnitude q are placed on x-axis at distance of 1, 2, 4, 8, ..... Meter from the origin respectively. Find intensity of the electric field at origin.

Infinite number of spheres , each of mass m are placed on the X- axis at distance 1,2,4,8,16, … meter from origin . The magnitide of the gravitational field at the origin is

A charge of 2C is placed on the x -axis at 1m from the origin along - ve x-axis.Infinite number of charges each of magnitude 2C are placed on x-axis at 1m,2m,4m,...from origin along + ve x -axis.The first charge is positive and alternate charges are of opposite in nature.The electric field intensity at the origin?

A number of particles each of mass 0.75kg are placed at distances 1m, 2m, 4m, 8m etc. from origin along positive X axis. the intensity of gravitational field at the origin will be -