D. C. Pandey Solutions for Chapter: Electrostatics, Exercise 1: Objective Problems [ Level1 ]

A soap bubble is given a negative charge, then its radius

Dielectric constant of pure water is $81.$ Its permittivity will be

There are two metallic spheres of same radii but one is solid and the other is hollow, then

Dielectric constant for metal is

Two spheres $\mathrm{A}$ and $\mathrm{B}$ of radius $4 \mathrm{cm}$ and $6 \mathrm{cm}$ are given charges of $80 \mathrm{\mu C}$ and $40 \mathrm{\mu C},$ respectively. If they are connected by a fine wire, the amount of charge flowing from one to the other is

In Millikan's oil drop experiment an oil drop carrying a charge $Q$ is held stationary by a potential difference $2400 \mathrm{V}$ between the plates. To keep a drop of half the radius stationary the potential difference had to be made $600 \mathrm{V}.$ What is the charge on the second drop?

A charged ball $B$ hangs from a silk thread $S,$ which makes an angle $\theta$ with a large charged conducting sheet $P,$ as shown in the figure. The surface charge density $\sigma$ of the sheet is proportional to

A light bulb, a capacitor, and a battery are connected together as shown here, with the switch $S$ initially open. When the switch $S$ is closed, which one of the following is true?