Electric field strength E , max charge = q. Find K = ?

In an uniform electric field of strength E, a charge particle Q moves point A to point B in the direction of the field and back from B to A. Calculate the ratio of the work done by the electric field in taking the charge particle from A to B and from B to A.

The electric field strength at a distance r from a charge q is E. What will be electric field strength if the distance of the observation point is increased to 2r (A) E/2 (B) E/4 (C) E/6 (D) none of the above

find the electric field strength due to a point charge of 5 muC at a distance of 80 cm from the charge.

Figure shown a charged conductor resting on an insulating stand. If at the point P the charge density is sigma , the potential is V and the electric field strength is E , what are the values of these quantities at point Q ?

Find the electric field strength due to 5 mu C of charge at point 30 m away from it in air.

In figure below, the point charge Q_(1) causes an electric potential of 60 V and an electric field strength of 30 Vm^(-1) at P . and the point charge Q_(2) separately causes a potential of 120 V and a field strength of 40 Vm^(-1) at P . Which one the following gives possible value of potential and field strength at P due to joint action of Q_(1) and Q_(2) ?

A protons of mass m charge 2 e is released from rest in a uniform electric field of strength E .The time taken by it to travel a distance d in the field is..

A protons of mass m charge c is released form rest in a uniform electric field of strength E .The time taken by it to travel a distance d in the field is

There is a uniform horizontal electric field of strength E in a region. A pendulum bob is pulled to make the string horizontal and released. The bob has mass m and charge q. (a) Find the maximum angle (theta_(0)) that the bob swings before coming to rest momentarily. (b) Find E if the bob comes to rest when the string is vertical.