Electric charges are distributed in a small volume. The flux of the electric field through a spherical surface of radius \(10~\mathrm{cm}\) surrounding the total charge is \(25\) V-m. The flux over a concentric sphere of radius \(20\) cm will be:
1. \(25\) V-m
2. \(50\) V-m
3. \(100\) V-m
4. \(200\) V-m

Subtopic:  Gauss's Law |
 71%
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 figure(a) shows an imaginary cube of edge \(L/2\). A uniformly charged rod of length \(L\) moves towards left at a small but constant speed \(u\). At \(t=0\), the left end just touches the centre of the face of the cube opposite it. Which of the graphs shown in figure(b) represents the flux of the electric field through the cube as the rod goes through it?

     
1. a
2. b
3. c
4. d

Subtopic:  Gauss's Law |
 56%
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 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 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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 |
 74%
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

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 |
 59%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links

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 |
 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 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 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 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 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh