Electric Charge...

A charged body has an electric flux F associated with it . Now if the body is place inside a conducting shell then the electric flux outside the shell is:

A charge of 1.0C is the placed at the top of the your college building and another equal charge at the top of your house. Take the separation between the two charges to be 2.0 km. Find the force exerted by the charges on each other.

Two coaxial coils are very close to each other and their mutual inductance is $$5$$ mH. If a current $$50\sin 500r$$ is passed in one of the coils then the peak value of induced e.m.f. in the secondary coil will be?

In a region of space, the electric field is given by $$\vec {E} = 8\hat {j} + 4\hat {j} + 3\hat {k}$$. The electric flux through a surface of area of $$100$$ units in $$x - y$$ plane is?

Determine the ratio $${q}_{1}/{q}_{2}$$. The lines of forces of two point charges are shown in figure.

There are two charges +2 $$\mu$$ C and -3 $$\mu$$ C. The ratio of forces acting on them will be

A positive charge $${q_o}$$ placed at a point $$P$$ near a charged body experiences a force of repulsion of magnitude $$F$$, the electric field $$E$$ of the charged body at $$P$$ is 

4 charges Q q Q q are placed in the vertices of square ABCD. Find the magnitude of force on charge q at corner C

Three equal charges $$2 \times 10^{-6}C$$ each, are held fixed at three vertices  of equilateral triangle of side $$5 \,cm$$. The force experienced by one of the charge due to the rest of two is

An infinite cylinder of radius 'R' carrying charge density . $$ p = ar +br^{2}$$ where 'r' distance of point from the axis and a b are non-zero constant. Find the ratio of a/b if field out of the cylinder is zero