Electrostatics Test

Result

Electrostatics Test - 4

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Weekly Quiz Competition

Question 1
4 / -1

Two point charges +q and –q are held fixed at (–d, o) and (d, o) respectively of a x-y coordinate system. Then

A
The electric field E at all points on the x-axis has the same direction

B
Electric field at all points on y-axis is along x-axis

C
Work has to be done in bringing a test charge from ¥ to the origin

D
The dipole moment is 2qd along the x-axis

Solution
Question 2
4 / -1

A hollow–sphere of charge does not produce an electric field at any

A
interior point

B
outer point

C
beyond 2 m

D
beyond 10 m
Question 3
4 / -1

Six charges of equal magnitude, 3 positive and 3 negative are to be placed on PQRSTU corners of a regular hexagon, such that field at the centre is double that of what it would have been if only one +ve charge is placed at R. Which of the following arrangement of charge is possible for P, Q, R, S, T and U respectively.

A
+ , +, +, –, –, –

B
–, + , +, +, –, –

C
–, + , +, –, +, –

D
+ , –, +, –, +, –

Solution
Question 4
4 / -1

A Gaussian surface in the figure is shown by dotted line. The electric field on the surface will be

A
due to q₁ and q₂ only

B
due to q₂ only

C
zero

D
due to all

Solution
Question 5
4 / -1

An object A has a charge of –2μC and the object B has a charge of +6 μC. Which statement is true?

A
F_AB = –3F_BA

B
F_AB = –F_BA

C
3F_AB = –F_BA

D
F_AB = 4F_BA

Solution
Question 6
4 / -1

Two equal negative charges –q are fixed at points (0, – a) and (0, a) on y – axis. A positive charge Q is released from rest at the point (2a, 0) on the x - axis. The charge Q will

A
execute simple harmonic motion about the origin

B
move to the origin remain at rest

C
move to infinity

D
execute oscillatory but not simple harmonic motion
Question 7
4 / -1

Two equal charges are separated by a distance d. A third charge placed on a perpendicular bisector at x distance from centre will experience maximum coulomb force, when

A

B

C

D

Solution
Question 8
4 / -1

Two identical charges repel each other with a force equal to 10 mg–wt, when they are 0.6 m apart in air (take, g =10 ms ^-2 ). The value of each charge is

A
2mC

B
2 x 10 ^-7 C

C
2 nC

D
2 μC

Solution
Question 9
4 / -1

A charge Q is divided in two parts q and Q – q. What is value of q for maximum force between them?

A

B

C

D

Solution
Question 10
4 / -1

A pendulum bob carries a negative charge – q. A positive charge +q is held at the point of support. Then, the time period of the bob is

A

B

C

D