Which of the following statements is correct about a dipole in a non-uniform field?

1.  Torque is always nonzero

2.  Net force may be nonzero

3.  Torque is always zero

4.  Net force is always zero

 

Subtopic:  Electric Dipole |
 56%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A particle of mass m has a charge q0 when it is at rest. When the particle moves with speed v, the charge on the particle will become (c is the velocity of light in vacuum)

1.  q0vc

2.  q0cv

3.  q01-v2c2

4.  q0

Subtopic:  Electric Charge |
 54%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Starting from rest an electron moves through a small distance in a uniform electric field of magnitude 2 × 104 NC-1. The direction of the field is reserved keeping the magnitude unchanged and a proton moves through the same distance. The time of motion will be

1.  Same in both cases

2.  More in the case of an electron

3.  More in the case of proton

4.  Independent of charge

Subtopic:  Electric Field |
 64%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A source charge Q is kept at a distance of 3 km from a test charge q0. If Q is displaced slightly, then the change in the electric field detected by q0 will be after

1.  10 s

2.  10 ms

3.  10 μs

4.  10 ns

Subtopic:  Electric Field |
 60%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Two-point charges -q and +9q are kept at r = 12 cm apart as shown. The electric field is zero at:

                 

1.  6 cm from point A toward B

2.  3 cm from point A opposite to B

3.  9 cm from point B towards A

4.  18 cm from the point B towards A

Subtopic:  Electric Field |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Two-point charges +2 μC and +6 μC repel each other with a force of 60 N. If a charge -4 μC is added to each of them, the force between them will become

1.  60 N

2.  360 N

3.  20 N

4.  40 N

Subtopic:  Coulomb's Law |
 83%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A cone of the radius of base 1 m and height 2 m is placed with its base in the xz plane in a region with the uniform electric field E = 20 i^ V/m as shown in the figure. The magnitude of electric flux linked with the cone is

1.  Zero

2.  10 Vm

3.  20 Vm

4.  40 π Vm

Subtopic:  Gauss's Law |
 72%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

There are two charges 1 μC and 2 μC. The ratio of the magnitude of forces acting on them due to their interaction will be

1.  1 : 2

2.  2 : 1

3.  1 : 1

4.  1 : 4 

Subtopic:  Coulomb's Law |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The dielectric constant for the metal in electrostatics is

1.  1

2.  0

3.  81

4.  Infinite

Subtopic:  Electric Field |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A cube of side a has a charge q at each of its vertices. The net electric field intensity at its center is: 

( r is the distance between a corner and the center and k = 1/4πε)

1.  Zero

2.  kqr2

3.  k12qr2

4.  k6qr

Subtopic:  Electric Field |
 84%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh