Electrostatics Test

Result

Electrostatics Test - 30

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Weekly Quiz Competition

Question 1
4 / -1

Two identical capacitors 1 and 2 are connected in series to a battery as shown in Fig. capacitor 2 contains a dielectric slab of constant K. Q₁ and Q₂ are the charges stored in C₁ and C₂. Now, the dielectric slab is removed and the corresponding charges are Q₁’ and Q₂’. Then

A

B

C

D

Solution
Question 2
4 / -1

The charge given to any conductor resides on its outer surface, because

A
The free charge tends to be in its minimum potential energy state

B
The free charge tends to be in its minimum kinetic energy state

C
The free charge tends to be in its maximum potential energy state

D
The free charge tends to be in its maximum kinetic energy state
Question 3
4 / -1

When the distance between the charged particles is halved, the force between them becomes

A
One-fourth

B
Half

C
Double

D
Four times

Solution
Question 4
4 / -1

There are two charges +1 µC and +5µC respectively. The ratio of the forces acting on them will be

A
1 : 5

B
1 : 1

C
5 : 1

D
1 : 25
Question 5
4 / -1

Under the influence of the Coulomb field of charge + Q, a charge –q is moving around it in an elliptical orbit. Find out the correct statement (s)

A
The angular momentum of the charge –q is constant

B
The linear momentum of the charge –q is constant

C
The angular velocity of the charge –q is constant

D
The linear speed of the charge –q is constant
Question 6
4 / -1

Three concentric metallic spherical shells of radii R, 2R, 3R, are given charges Q₁, Q₂, Q₃ respectively. It is found that the surface charge densities on the outer surfaces of the shells are equal. Then, the ratio of the charges given to the shells, Q₁ : Q₂ : Q₃, is

A
1 : 2 : 3

B
1 : 3 : 5

C
1 : 4 : 9

D
1 : 8 : 18

Solution
Question 7
4 / -1

The ratio of the forces between two small spheres with constant charge (a) in air (b) in a medium of dielectric constant K is

A
1 : K

B
K : 1

C
1 : K²

D
K² : 1

Solution
Question 8
4 / -1

A soap bubble is given a negative charge, then its radius

A
Decreases

B
Increases

C
Remains unchanged

D
Nothing can be predicted as information is insufficient

Solution
Question 9
4 / -1

Four charges are arranged at the corners of a square ABCD, as shown in the adjoining figure. The force on the charge kept at the centre 0 is

A
Zero

B
Along the diagonal AC

C
Along the diagonal BD

D
Perpendicular to side AB
Question 10
4 / -1

A charge Q is placed at each of the opposite corners of a square. A charge q is placed at each of the other two corners. If the net electrical force on Q is zero, then Q/q equals

A

B

C
1

D

Solution