Electric Charges and Fields Set 5

A capacitor is charged from to Increase in energy will be

A ring of radius carries a charge uniformly distributed over its length. A charge is placed at its centre will experience a force equal to

Two point charge and are situated at the origin and at the point respectively. The point along the -axis where the electric field vanishes is

The electric field at a point on equatorial line of a dipole and direction of the dipole moment

A solid sphere of radius and volume charge density is enclosed by a hollow sphere of radius with negative surface charge density, such that the total charge in the system is zero, is a positive constant and is the distance from the centre of sphere. The ratio is

In the following diagram the work done in moving a point charge from point to point and is respectively as and then

The capacitance of a metallic sphere will be , if its radius is nearly

The figure shows the path of a positively charged particle 1 through a rectangular region of uniform electric field as shown in the figure. What is the direction of electric field and the direction of particles 2, 3 and 4

A uniformly charged thin spherical shell of radius carries uniform surface charge density of per unit area. It is made of two hemispherical shells, held together by pressing them with force (see figure). is proportional to

All capacitors used in the diagram are identical and each is of capacitance Then the effective capacitance between the points and is