The figure shows a charge q placed at the centre of a hemisphere. A second charge Q is placed at one of the positions A, B, C and D. In which position(s) of this second charge, the flux of the electric field through the hemisphere remains unchanged?

                      

(a) A
(b) B
(c) C
(d) D

Choose the correct option 

1. (a), (c)

2. (b), (c)

3. (d) only

4. (a), (d)

Subtopic:  Gauss's Law |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A closed surface S is constructed around a conducting wire connected to a battery and a switch (shown in the figure). As the switch is closed, the free electrons in the wire start moving along the wire. In any time interval, the number of electrons entering the closed surface S is equal to the number of electrons leaving it. On closing the switch, the flux of the electric field through the closed surface

        

(a) is increased
(b) is decreased
(c) remains unchanged
(d) remains zero

Choose the correct option 

1. (a), (b) 

2. (b), (c) 

3. (d) only

4. (c), (d) 

Subtopic:  Gauss's Law |
 59%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The figure shows a closed surface which intersects a conducting sphere. If a positive charged is placed at the point P, the flux of the electric field through the closed surface

             

(a) will remain zero
(b) will become positive
(c) will become negative
(d) will become undefined

Choose the correct option 

1. (a), (b) 

2. (b), (c) 

3. (b) only

4. (a), (d)

Subtopic:  Gauss's Law |
 56%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Two metal spheres of capacitances C1 and C2 carry some charges. They are put in contact and then separated. The final charges Q1 and Q2 on them will satisfy

1.    \(\frac{\mathrm{Q}_{1}}{\mathrm{Q}_{2}}<\frac{\mathrm{C}_{1}}{\mathrm{C}_{2}}\)

2.    \(\frac{\mathrm{Q}_{1}}{\mathrm{Q}_{2}}=\frac{\mathrm{C}_{1}}{\mathrm{C}_{2}}\)

3.    \(\frac{\mathrm{Q}_{1}}{\mathrm{Q}_{2}}>\frac{\mathrm{C}_{1}}{\mathrm{C}_{2}}\)

4.    \(\frac{\mathrm{Q}_{1}}{\mathrm{Q}_{2}}<\frac{\mathrm{C}_{2}}{\mathrm{C}_{1}}\)

Subtopic:  Electric Charge |
 80%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

An electric dipole is placed at the centre of a sphere. Mark the correct options:

(a) The flux of the electric field through the sphere is zero.

(b) The electric field is zero at every point of the sphere.

(c) The electric field is not zero anywhere on the sphere.

(d) The electric field is zero on a circle on the sphere.

Choose the correct option 

1. (a) , (c) 

2. (b) , (c) 

3. (d) only

4. (a) , (d) 

Subtopic:  Gauss's Law |
 60%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links

If the flux of the electric field through a closed surface is zero,

(a) the electric field must be zero everywhere on the surface

(b) the electric field may be zero everywhere on the surface

(c) the charge inside the surface must be zero

(d) the charge in the vicinity of the surface must be zero.

Choose the correct option 

1. (a) , (b) 

2. (b) , (c) 

3. (d) only

4. (a) , (d) 

Subtopic:  Gauss's Law |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A large nonconducting sheet M is given a uniform charge density. Two uncharged small metal rods A and B are placed near the sheet as shown in the figure.

        

(a) M attracts A
(b) M attracts B
(c) A attracts B
(d) B attracts A

Choose the correct option 

1. (a) , (b) 

2. (c) , (d)

3. (a) , (d)

4. All of the above

Subtopic:  Electric Charge |
 62%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A positive point charge Q is brought near an isolated metal cube.

(a) The cube becomes negatively charged.

(b) The cube becomes positively charged.

(c) The interior becomes positively charged and the surface becomes negatively charged.

(d) The interior remains charge free and the surface gets nonuniform charge distribution.

Choose the correct option 

1. (a) , (b) 

2. (b) , (c) 

3. (d) only

4. (a) , (d) 

Subtopic:  Electric Charge |
 60%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Given below are four statements:

(a) Gauss’s law is valid only for symmetrical charge distributions.
(b) Gauss’s law is valid only for charges placed in vacuum.
(c) The electric field calculated by Gauss’s law is the field due to the charges inside the Gaussian surface.
(d) The flux of the electric field through a closed surface due to all the charges is equal to the flux due to the charges enclosed by the surface.


Choose the correct option:

1. (a), (b) 
2. (b), (c)
3. (d) only
4. (a), (d)
Subtopic:  Gauss's Law |
 56%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A charge \(q\) is placed at the centre of the open end of a cylindrical vessel (shown in the figure). The flux of the electric field through the surface of the vessel is: 

            

1. zero
2. \(q/\varepsilon_0~\)
3. \(q/2\varepsilon_0~\)
4. \(2q/\varepsilon_0~\)

Subtopic:  Gauss's Law |
 61%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch