Electric Charge...

The force between two charges 0.06$$\mathrm { m }$$ apart is 5$$\mathrm { N }$$ . If the charges are moved towards each  other by 0.05$$\mathrm { m }$$ , then the force between them is 

A hemispherical surface of radius R is kept in a uniform electric field E as shown  in figure .The flux through the curved surface is 

A point charge is placed at origin. Electric field due to that charge at point (a, b, c) is $$E_1 \hat{i}+ E_2 \hat{j}+ E_3 \hat{k}.$$ Then electric field at (a, 0, 0) due to that charge will be

Six charges +Q each are placed at the corners of a regular hexagon of side (a). The electric field at the center of hexagon is- 

A point charge  $$q$$  is placed at a point inside a hollow conducting sphere. Which of the following electric force pattern is correct?

A charge $$Q\mu C$$ is placed at the center of a cube, the flux coming out from three face will be (in coulomb) :

A small element $$ l $$ is cut from a circular ring of radius $$a$$ and $$\lambda $$ charge per unit length. The net electric field at the center of the remaining ring is

The force between two charges $$0.06m$$ apart is $$5N$$. If each charge is moved towards the other by $$0.01m$$, then the force between will become

If $$+ q $$charge is placed inside any spherical surface then total flux coming out from whole surface will be -

Two point charges 1 and 5 $$\mu C$$ are separated by a certain distance. What will be ratio of forces acting on these two?