Electric Charge...

Two equal point charges each of $$3\mu C$$ are separated by a certain distance in metres. If they are located at $$\left( i+j+k \right) $$ and $$\left( 2i+3j+k \right) $$, then the electrostatic force between them is

A cylinder of radius r and length l is placed in a uniform electric field of intensity E acting parallel to the axis of the cylinder. The total flux over curved surface area is:

An electron is moving round the nucleus of hydrogen atom in a circular orbit of radius. The coulomb force F between the two is?

Electric field produced due to an infinitely long straight uniformly charged wire at perpendicular distance of $$2 cm$$ is $$3\times { 10 }^{ 8 }N{ C }^{ -1 }$$. Then, linear charge density on the wire is _____________.
$$\left( K=9\times { 10 }^{ 9 }SI\quad unit \right) $$

The electrostatic force between two point charges is directly proportional to the 

Two lithium nuclei in lithium vapour at room temperature do not combine to form a carbon nucleus because

If two charges $$+4e$$ and $$+e$$ are at a distance $$x$$ apart then at what distance charge $$q$$ must be placed from $$+e$$, so that it is in equilibrium?

There exists an electric field of $$1$$N$$/$$C along Y direction. The flux passing through the square of $$1$$m placed in XY plane inside the electric field is?

The electric charges are distributed in a small volume. The flux of the electric field through a spherical surface of radius $$10cm$$ surrounding the total charge is $$20Vm$$. The flux over a concentric sphere of radius $$20cm$$ will be

If a mass of $$20\ g$$ having charge $$3.0\ mC$$ moving with velocity $$20\ ms^{-1}$$ enters a region of electric field of $$80\ NC^{-1}$$ in the same direction as the velocity of mass, then the velocity of mass after $$3s$$ in the region will be