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Easy
Question
An infinite, uniformly charged sheet with surface charge density 
cuts through a spherical Gaussian surface of radius R at a distance x from its center, as shown in the figure. The electric flux F through the Gaussian surface is
The correct answer is:
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Both question (a) and (b) refer to the system of charges as shown in the figure. A spherical shell with an inner radius 'a' and an outer radius 'b' is made of conducting material. A point charge +Q is placed at the centre of the spherical shell and a total charge – q is placed on the shell
Charge – q is distributed on the surfaces as
Both question (a) and (b) refer to the system of charges as shown in the figure. A spherical shell with an inner radius 'a' and an outer radius 'b' is made of conducting material. A point charge +Q is placed at the centre of the spherical shell and a total charge – q is placed on the shell
Charge – q is distributed on the surfaces as
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4 charges are placed each at a distance 'a' from origin. The dipole moment of configuration is
4 charges are placed each at a distance 'a' from origin. The dipole moment of configuration is
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Two short electric dipoles are placed as shown. The energy of electric interaction between these dipoles will be
Two short electric dipoles are placed as shown. The energy of electric interaction between these dipoles will be
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A large sheet carries uniform surface charge density . A rod of length 2l has a linear charge density 
on one half and 
on the second half. The rod is hinged at mid point O and makes an angle 
with the normal to the sheet. The torque experienced by the rod is
A large sheet carries uniform surface charge density . A rod of length 2l has a linear charge density on one half and on the second half. The rod is hinged at mid point O and makes an angle with the normal to the sheet. The torque experienced by the rod is
physics-General
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Figure shows the electric field lines around an electric dipole. Which of the arrows best represents the electric field at point P?
Figure shows the electric field lines around an electric dipole. Which of the arrows best represents the electric field at point P?
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A, B, C, D, P and Q are points in a uniform electric field. The potentials a these points are V (A) = 2 volt. V (P) = V (B) = V (D) = 5 volt. V (C) = 8 volt. The electric field at P is
A, B, C, D, P and Q are points in a uniform electric field. The potentials a these points are V (A) = 2 volt. V (P) = V (B) = V (D) = 5 volt. V (C) = 8 volt. The electric field at P is
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An equilateral triangle wire frame of side L having 3 point charges at its vertices is kept in x-y plane as shown. Component of electric field due to the configuration in z direction at (0, 0, L) is [origin is centroid of triangle]
An equilateral triangle wire frame of side L having 3 point charges at its vertices is kept in x-y plane as shown. Component of electric field due to the configuration in z direction at (0, 0, L) is [origin is centroid of triangle]
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A wheel having mass m has charges +q and –q on diametrically opposite points. It remains in equilibrium on a rough inclined plane in the presence of uniform vertical electric field E =
A wheel having mass m has charges +q and –q on diametrically opposite points. It remains in equilibrium on a rough inclined plane in the presence of uniform vertical electric field E =
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Find the force experienced by the semicircular rod charged with a charge q, placed as shown in figure. Radius of the wire is R and the line of charge with linear charge density l is passing through its centre and perpendicular to the plane of wire.
Find the force experienced by the semicircular rod charged with a charge q, placed as shown in figure. Radius of the wire is R and the line of charge with linear charge density l is passing through its centre and perpendicular to the plane of wire.
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physics-
A uniform electric field having strength 
is existing in x-y plane as shown in figure. Find the p.d. between origin O & A(d, d, 0)
A uniform electric field having strength is existing in x-y plane as shown in figure. Find the p.d. between origin O & A(d, d, 0)
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Figure shows equi-potential surfaces for a two charges system. At which of the labeled points point will an electron have the highest potential energy?
Figure shows equi-potential surfaces for a two charges system. At which of the labeled points point will an electron have the highest potential energy?
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Two point charges of +Q each have been placed at the positions (–a /2, 0, 0) and (a / 2, 0, 0). The locus of the points where –Q charge can be placed such the that total electrostatic potential energy of the system can become equal to zero, is represented by which of the following equations?
Two point charges of +Q each have been placed at the positions (–a /2, 0, 0) and (a / 2, 0, 0). The locus of the points where –Q charge can be placed such the that total electrostatic potential energy of the system can become equal to zero, is represented by which of the following equations?
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The diagram shows three infinitely long uniform line charges placed on the X, Y and Z axis. The work done in moving a unit positive charge from (1, 1, 1) to (0, 1, 1) is equal to
The diagram shows three infinitely long uniform line charges placed on the X, Y and Z axis. The work done in moving a unit positive charge from (1, 1, 1) to (0, 1, 1) is equal to
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A particle of mass 1 kg & charge 
is projected towards a non conducting fixed spherical shell having the same charge uniformly distributed on its surface. Find the minimum initial velocity of projection required if the particle just grazes the shell.
A particle of mass 1 kg & charge is projected towards a non conducting fixed spherical shell having the same charge uniformly distributed on its surface. Find the minimum initial velocity of projection required if the particle just grazes the shell.
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A hemisphere of mass 3m and radius R is free to slide with its base on a smooth horizontal table. A particle of mass m is placed on the top of the hemisphere. If particle is displaced with a negligible velocity, then find the angular velocity of the particle relative to the centre of the hemisphere at an angular displacement q, when velocity of hemisphere is v
A hemisphere of mass 3m and radius R is free to slide with its base on a smooth horizontal table. A particle of mass m is placed on the top of the hemisphere. If particle is displaced with a negligible velocity, then find the angular velocity of the particle relative to the centre of the hemisphere at an angular displacement q, when velocity of hemisphere is v
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