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Can two like charged bodies attract each other explain?

Important Questions on Electrostatics

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A neutral spherical copper particle has a radius of 10 nm1 nm=10-9 m. It gets charged by applying the voltage slowly adding one electron at a time. Then, the graph of the total charge on the particle versus the applied voltage would look like
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Two identical conducting spheres A and B carry equal charge. They are initially separated by a distance much larger than their diameters and the force between them is F. A third identical conducting sphere C is uncharged. Sphere C is first touched to A, then to C and removed. As a result, the force between A and B now is
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Two isolated conducting spheres S1 and S2 of radius 23R and 13R have 12 μC and -3 μC charges, respectively, and are at a large distance from each other, They are now connected by a conducting wire. A long time after this is done the charges on S1 and S2 are respectively:
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A comb runs through one's dry hair attracts small bits of paper. This is due to
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A table tennis ball, covered with conducting paint, is suspended by a silk thread so that it hang between two plates. Out of these, one is earthed and other is connected to a high voltage generator. This ball,
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A neutral metallic sphere is placed near a negative point charge (outside the sphere). The net charge on sphere is,

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Which of the following cannot be charged easily by friction?
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Let A and B are two identical objects of same mass initially are charged electro statically by rubbing against each other. Let A has got a positive charge and B has got a negative charge, then match column I and column II.
  Column I   Column II
(i) Mass of A a. Increases
(ii) Mass of B b. Decreases
(iii) Work function of A               c.                      Is less                       
(iv) Work function of B d. Is more
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Assertion: If there exists coulomb attraction between two bodies both of them may not be charged.

Reason: In coulomb attraction two bodies are oppositely charged.
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Five Styrofoam balls are suspended from insulating threads. Several experiments are performed on the balls and the following observations are made -

(i) Ball A repels C and attracts B

(ii) Ball D attracts B and has no effect on E

(iii) A negatively charged rod attracts both A and E.

An electrically neutral Styrofoam ball gets attracted if placed nearby a charged body due to induced charge. What are the charges, if any, on each ball


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Two identical metal spheres A and B are supported on insulating stands and are placed in contact. What kind of charges will A and B develop when a negatively charged ebonite rod is brought near A?
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Two insulated charged spheres of radii 20 cm and 25 cm, respectively, and having an equal charge Q are connected by a copper wire. Then, they are separated. Which of the following is correct ?
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The diagram shows an earthed conducting sphere held close to a positively charged dome.




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What is the charge and potential of the conducting sphere?
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In a system used for spraying cars, a car body is positively charged. Neutral droplets of paint are then attracted to the car because the positive car body induces a charge on the droplets of paint. Which diagram best shows the charge pattern?
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The energy spectrum of a black body exhibits a maximum around a wavelength λ0. The temperature of the black body is now changed such that the energy is maximum around a wavelength 3λ04 . The power radiated by the black body will now increase by a factor of
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Assertion: If a point charge q is placed in front of an infinite grounded conducting plane surface, the point charge will experience a force.

Reason: This force is due to the induced charge on the conducting surface which is at zero potential.
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A cylindrical conductor is placed near another positively charged conductor. The net charge acquired by the cylindrical conductor will be
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Physics>Electricity and Magnetism>Electrostatics>Methods of Charging
When a body is charged by induction, then the body
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Physics>Electricity and Magnetism>Electrostatics>Methods of Charging
A neutral metallic sphere is placed near a negative point charge (outside the sphere). The net charge on sphere, then 


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Physics>Electricity and Magnetism>Electrostatics>Methods of Charging
In a system used for spraying cars, a car body is positively charged. Neutral droplets of paint are then attracted to the car because the positive car body induces charge on the droplets of paint. Which diagram best shows the charge pattern?