Electrostatics MCQs – Test 2 1

A capacitor of 2 μF is charged as shown in the diagram. When the switch S is turned to position 2, the percentage of its stored energy dissipated is [NEET 2016]

A parallel plate air capacitor of capacitance C is connected to a cell of emf V and then disconnected from it. A dielectric slab of dielectric constant K, which can just fill the air gap of the capacitor, is now inserted in it. Which of the following is incorrect? [AIPMT 2015]

Two charges, each equal to q, are kept at x = – a and x = a on the x-axis. A particle of mass m and charge q₀ = q/2 is placed at the origin. If charge q₀ is given a small displacement (y << a) along the y-axis, the net force acting on the particle is proportional to [JEE Main 2013]

Two spherical conductors A and B of radii 1 mm and 2 mm are separated by a distance of 5 cm and are uniformly charged. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of the electric fields at the surface of spheres A and B is [AIEEE 2006]

Consider a neutral conducting sphere. A positive point charge is placed outside the sphere. The net charge on the sphere is then, [IIT JEE 2007]