Accelerate NEET 2020: Electrostatics Class 3 (17.08.2019)

Acceleration of a charged particle of charge ‘q’ and mass ‘m’ moving in a uniform electric field of strength ‘E’ is

Two particles X and Y, of equal mass and with unequal positive charges, are free to move and are initially far away from each other. With Y at rest, X begins to move towards it with initial velocity u. After a long time, finally.

A particle of mass m and charge +q approaches from a very large distance towards a uniformly charged ring of radius R and charge, mass same as that of particle, with initial velocity u along the axis of the ring as shown in the figure. What is the closest distance of approach between the ring and the particle? Assume the space to be gravity free and frictionless.

Two small balls each having equal positive charge Q are suspended by two insulating strings at equal length L metre, from a hook fixed to a stand. The whole set-up is taken in a satellite into space where there is no gravity. Then the angle θ between two strings and tension in each string is -