Electrostatics ...

Two metal pieces having a potential difference of 800V are 0.02 m apart horizontally. A particle of mass 1.96 × 10^–15 kg is suspended in equilibrium between the plates. If e is the elementary charge, then charge on the particle is

The figure shows some of the electric field lines corresponding to an electric fields. The figure suggests

Two spheres of radii a andb respectively are charged and joined by a wire. The ration of electric field of thespheres is

A particle of mass m and charge q is placed at rest in a uniform electric field E and then released. The kinetic energy attained by the particle after moving a distance y is

A hollow insulated conducting sphere is given a positive charge of 10 µC. What will be the electric field at the centre of the sphere if its radius is 2 m?

An electron of mass m_e initially at rest moves through a certain distance in a uniform electric field in time t₁. A proton of mass m_p also initially at rest takes time t₂ to move thorough an equal distance in this uniform electric field. Neglecting the effect of gravity, the ratio of t₂ / t₁ is nearly equal to

A cube of side b has a charge q at each of its vertices. The electric field due to this charge distribution at the centre of this cube will be

Four charges are placed on corners of a square as shown in figure having side of 5 cm If Q is one microcoulomb, then electric field intensity at centre will be

Point charge +4q, –q and +4q are kept on the x-axis at points x = 0, x = a and x = 2a respectively, then

If a charged spherical conductor of radius 10 cm has potential V at a point distant 5 cm from its centre, then the potential at a point distant 15 cm from the centre will be