Physics

In the circuit shown in figure initially key K₁is closed and key K₂ is open. Then K₁ is opened and K₂ is closed (order is important). [Take Q'₁ and Q'₂ as charges on C₁ and C₂ and V₁ and V₂ as voltage respectively.] Then, E

(a) Charge on C, gets redistributed such that V₁ = V₂

(b) Charge on C₁ gets redistributed such that Q'₁ = Q'₂

(c) Charge on C₁ gets redistributed such that C₁V₁ + C₂V₂ = C₁E

(d) Charge on C₁ gets redistributed such that Q'₁ + Q'₂=Q

In the circuit shown in figure initially key K₁is closed and key K₂ is open. Then K₁ is opened and K₂ is closed (order is important). [Take Q’₁ and Q’₂ as charges on C₁ and C₂ and V₁ and V₂ as voltage respectively.] Then, E

(a) Charge on C, gets redistributed such that V₁ = V₂

(b) Charge on C₁ gets redistributed such that Q’₁ = Q’₂

(c) Charge on C₁ gets redistributed such that C₁V₁ + C₂V₂ = C₁E

(d) Charge on C₁ gets redistributed such that Q’₁ + Q’₂=Q

In a region of constant potential

(a) The electric field is uniform

(b) The electric field is zero

(c) There can be no charge inside the region

(d) The electric field shall necessarily change if a charge is placed outside the region

The work done to move a charge along an equipotential from A to B

Equipotential surfaces

(a) are closer in regions of large electric fields compared to regions of lower electric fields

(b) will be more crowded near sharp edges of a conductor

(c) will be more crowded near regions of large charge densities

(d) will always be equally spaced

Consider a uniform electric field in the z -direction. The potential is a constant

(a) in all space                             

(b) for any x for a given z

(c) for any y for a given z             

(d) on the x-y plane for a given z

A parallel plate capacitor is made of two dielectric blocks in series. One of the blocks has thickness d₁and dielectric constant K₁ and the other has thickness d₂ and dielectric constant K₂ as shown in figure. This arrangement can be thought as a dielectric slab of thickness d (= d₁ + d₂) and effective dielectric constant K. Then K is

Equipotential at a great distance from a collection of charges whose total sum is not zero are approximately

(a) Spheres                     

(b) Planes

(c) Paraboloids               

(d) Ellipsoids

The electrostatic potentiaLon the surface of a charged conducting sphere is 100 V. Two statements are made in this regard.

S₁ : At any point inside the sphere, electric intensity is zero.

S₂: At any point inside the sphere, the electrostatic potential is 100 V.

Which of the following is a correct statement?

(a) S₁is true but S₂ is false

(b) Both S₁ and S₂ are false

(c) S₁ is true, S₂ is also true and S₁, is the cause of S₂

(d) S₂ is true, S₂ is also true but the statements are independent

Figure shows some equipotential lines distributed in space. A charged object is moved from point A to point B.

(a) The work done in Fig. (i) is the greatest

(b) The work done in Fig. (ii) is least

(c) The work done is the same in Fig. (i), Fig.(ii) and Fig. (iii)

(d) The work done in Fig. (iii) is greater than Fig. (ii) but equal to that in