Test: Electrostatics - 2 - Grade 9 MCQ
15 Questions MCQ Test - Test: Electrostatics - 2
Two spheres of radii r and R carry charges q and Q respectively. When they are connected by a wire, there will be no loss of energy of the system if
or 
In the figure shown, conducting shells A and B have charges Q and 2Q distributed uniformly over A and B. Value of VA − VB is
The electric potential at a point (x,y) is given by: V = −Kxy. The electric field intensity a distance r from the origin varies as
A charge 
is placed at the axis of a charged ring of radius 
at a distance of 
as shown in figure. If ring is fixed and carrying a charge 
, the kinetic energy of charge 
when it is released and reaches the centre of ring will be,
at 
(c)
A solid hemispherical uniform charged body having charge Q is kept symmetrically along the y -axis as shown in figure. The electric potential at a distance d from the origin along the x -axis at point P will be
due to this spherical charge 
and 
are placed 
apart as shown. A third charge 
is moved along the arc of a circle of radius 
from 
to 
The change in the potential energy of the system is 
, where 
is
(a)
Half part of ring is uniformly positively charged and other half is uniformly negatively charged. Ring is in equilibrium in uniform electric field as shown and free to rotate about an axis passing through its centre and perpendicular to plane. The equilibrium is
are in same direction, so potential energy 
A conducting disk is of radius R is rotating with an angular velocity ω allowing the fact that electrons are the current carriers in conductor, the potential difference between the centre of the disc and edge is (mass and charge of electron is m and e and neglect gravity)
Three identical particles, each possessing the mass m and charge +q, are placed at the corners of an equilateral triangle with side r0. The particles are simultaneously set free and start flying apart symmetrically due to Coulomb's repulsion forces. The work performed by Coulomb's forces acting on each particle until the particles fly from one another to a very large distance is (where k = 1/4πε0.)
is equal to decrease in P.E. 
is charged by a battery to a potential difference of 
between its plates. The charging battery is now disconnected and a porcelain slab of dielectric constant 
is slipped between the plates. The work done by the capacitor on the slab is
is charged such that the potential on its surface is 
. The potential at a distance of 
from the centre of the sphere is
potential at the surface of the sphere 
.
to point 
, then
In moving from 
to 
along an electric field line, the work done by the electric field on an electron is 
. If 
and 
are equipotential surfaces, then the potential difference 
is
and 
have similar charges with equal surface charge densities 
. What is the electric potential at their common centre ?
Charge on the inner sphere 
A plastic disc is charged on one side with a uniform surface charge density 
and then three quadrant of the disk are removed. The remaining quadrant is shown in figure, with 
at infinity, the potential due to the remaining quadrant at point 
is
due to whole disc is 
Important Questions for Electrostatics - 2
Electrostatics - 2 MCQs with Answers
Online Tests for Electrostatics - 2
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