Electric Charge...

the point $$P$$, the flux of the electric field through the closed surface:

A point charge $$+q$$ is placed at the centre of a cube of side $$L$$. The electric flux emerging from the cube is

A point charge of $$40\ stat\ $$ coulomb is placed $$2\ cm$$ in front of an earthed metallic plane plate of large size. Then, the force of attraction on the point charge is

A charged particle $$q$$ is projected in an electric field produced by a fixed point charge $$Q$$ as shown in the figure. Select the correct statements:

Two identical balls having charge $$10mC$$ and $$=1mC$$ are placed at a distance of $$10m$$ from each other, then the force between them will be

A charged oil drop od mass $$ 2.5\times { 10 }^{ -7 } kg$$ is in space between the two plates, each of area $$ 2\times { 10 }^{ -2 } { m }^{ 2 }$$ of a parallel plate capacitor. When the upper plate has a charge of $$ 5\times { 10 }^{ -7 } C$$ and the lower plate has an equal negative charge then the oil remains stationery. The charge of the oil drop is (take, $$g=10 { m/s }^{ 2 }$$)

A point charge $${q_1} =  - 5.8\mu C$$ is held stationary at the origin . A second point charge $${q_2} =  + 4.3\mu C$$ moves from the point $$(0.26m,0,0)$$ to $$(0.38m,0,0)$$.How much work is done by the electric force on {q_2}.

The line integral of an electric field along the circumference of a circle of radius r drawn with a point Q at the centre will be _____

A hemisphere shell is uniformly charged positively. The electric field at a point on a diameter away from the centre (inside the boundary of hemisphere shell) is directed

A square of side 'a' is lying in xy plane that two of its sides are lying on the axis. If $$\vec{E} = E_0 x \hat{k}$$ is applied on the square. The flux passing through the square is