Electric Charge...

A charged particle moves in an electric field from $$A$$ to $$B$$ and then $$B$$ to $$A$$.

A metallic particle having no net charge is placed near a finite metal plate carrying a positive charge. The electric force on the particle will be 

Number of electric lines of force from $$0.5\ C$$ of positive charge in a dielectric medium of dielectric constant $$10$$ is

If a body is charged by rubbing it, its weight

An electron is released from rest in a region of space with a non-zero electric field. Which of the following statements is true?

Three charges of $$q_{1} = 1\times 10^{-6}C, q_{2} = 2\times 10^{-6}C$$ and $$q_{3} = -3\times 10^{-6}C$$ have been placed as shown. Then, the net electric flux will be maximum for the surface.

F is the force between two charges. If the distance between them is tripled, then the force between the charges will be :

An attractive force of $$9$$ N acts between $$+5$$ C and $$-5$$ C at some distance. These charges are allowed to touch each other and are then again placed at their initial position. The force acting between them will be :

A very small ball has a mass of $$5.00 \times 10^{-3} \,kg$$ and
a charge of $$4.00 \,mC$$. What magnitude electric field directed upward will balance the weight of the ball so that the ball is suspended motionless above the ground? 

Two point charges attract each other with an electric force of magnitude F. If the charge on one of the particles is reduced to one-third its original value and thedistance between the particles is doubled, what is the resulting magnitude of the electric force between them?