Electrostatics Test

Result

Electrostatics Test - 78

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Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

Two equal negative charges –q are fixed at points (0, a) and (0, – a) on the Y-axis. A positive charge \'q\' is released from rest at the point (x << a) on the x-axis. What is the frequency of motion?

A

B

C

D

Solution
Question 3
4 / -1

A spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume in the figure. The electric field inside the emptied space is

A
Zero everywhere

B
Non-zero and uniform

C
Non-uniform

D
Zero only at its centre

Solution
Question 4
4 / -1

A circuit is connected as shown in the figure with the switch S open. When the switch is closed, the total amount of charge that flows from Y to X is

A
0 µC

B
54 µC

C
27 µC

D
81 µC

Solution
Question 5
4 / -1

A
3

B
5

C
2

D
Both (a) and (b)

Solution
Question 6
4 / -1

A parallel plate capacitor C with plates of unit area and separation d is filled with a liquid of dielectric constant K = 2. The level of liquid is d/3 initially. Suppose, the liquid level decreases at a constant speed V, the time constant as a function of time t is

A

B

C

D

Solution
Question 7
4 / -1

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

A

B

C

D

Solution
Question 8
4 / -1

Two identical charged spheres suspended from a common point by two massless strings of length l are initially a distance d (d << 1) apart because of their mutual repulsion. The charge begins to leak from both the spheres at a constant rate. As a result the charges approach each other with a velocity v. Then, as a function of distance x between them

A

B

C

D

Solution
Question 9
4 / -1

Which of the field patterns given below is valid for electric field as well as for magnetic field?

A

B

C

D
Question 10
4 / -1

Which of the following statement (s) is/are correct?

A
If the electric field due to a point charge varies as r^–2.5 instead of r^–2, then the Gauss law will still be valid

B
The Gauss law can be used to calculate the field distribution around an electric dipole

C
If the electric field between two point charges is zero somewhere, then the sign of the two charges is the same

D
The work done by the external force in moving a unit positive charge from point A at potential V_A to point B at potential V_B is (V_B – V_A)

Solution