Select Question Set:
Q. No.An electric dipole of dipole moment \({p}\) is aligned parallel to a uniform electric field \({E}.\) The energy required to rotate the dipole by \(90^\circ\) is:
1. \( p^2 E\)
2. \( p E\)
3. infinite
4. \( {pE}^2\)
Subtopic: Electric Dipole |
90%
From NCERT
NEET - 2013
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
If \(\oint_s \vec{E} \cdot {d \vec S}=0\) over a surface, then:
| 1. | the electric field inside the surface is necessarily uniform. |
| 2. | the number of flux lines entering the surface must be equal to the number of flux lines leaving it. |
| 3. | the magnitude of electric field on the surface is constant. |
| 4. | all the charges must necessarily be inside the surface. |
Subtopic: Gauss's Law |
81%
From NCERT
NEET - 2023
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
An electric dipole is placed at an angle of \(30^\circ\) with an electric field of intensity \(2\times 10^5 ~\text{NC}^{-1}\). It experiences a torque equal to \(4~\text{N-m}\). If the dipole length is \(2\) cm, calculate the magnitude of the charge on the dipole.
| 1. | \(2~\text{mC}\) | 2. | \(8~\text{mC}\) |
| 3. | \(6~\text{mC}\) | 4. | \(4~\text{mC}\) |
Subtopic: Electric Dipole |
76%
From NCERT
NEET - 2023
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
According to Gauss's law in electrostatics, the electric flux through a closed surface depends on:
| 1. | the area of the surface |
| 2. | the quantity of charges enclosed by the surface |
| 3. | the shape of the surface |
| 4. | the volume enclosed by the surface |
Subtopic: Gauss's Law |
84%
From NCERT
NEET - 2023
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
A system has two charges \(q_1=4.5\times 10^{-6}~\text{C}\) and \(q_2=-4.5\times 10^{-6}~\text{C}\) located at points \(A\text:(0,0,-20)~\text{cm}\) and \(B\text:(0,0,+20)~\text{cm},\) respectively. The electric dipole moment of the system is:
1. \(9\times 10^{-6}~\text{C-m}\)
2. \(1.8\times 10^{-7}~\text{C-m}\)
3. \(1.8\times 10^{-6}~\text{C-m}\)
4. \(9\times 10^{-7}~\text{C-m}\)
1. \(9\times 10^{-6}~\text{C-m}\)
2. \(1.8\times 10^{-7}~\text{C-m}\)
3. \(1.8\times 10^{-6}~\text{C-m}\)
4. \(9\times 10^{-7}~\text{C-m}\)
Subtopic: Electric Dipole |
69%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The ratio of Coulomb's electrostatic force to the gravitational force between an electron and a proton separated by some distance is \(2.4\times 10^{39}.\) The ratio of the proportionality constant, \(k=\frac{1}{4\pi\varepsilon_0}\) to the gravitational constant \(G\) is nearly:
(Given that the charge of the proton and electron each \(=1.6\times 10^{-19},\) the mass of the electron \(=9.11\times 10^{-31}~\text{kg},\) the mass of the proton \(=1.67\times 10^{-27}~\text{kg}\) ):
1. \(10^{20}\)
2. \(10^{30}\)
3. \(10^{40}\)
4. \(10\)
(Given that the charge of the proton and electron each \(=1.6\times 10^{-19},\) the mass of the electron \(=9.11\times 10^{-31}~\text{kg},\) the mass of the proton \(=1.67\times 10^{-27}~\text{kg}\) ):
1. \(10^{20}\)
2. \(10^{30}\)
3. \(10^{40}\)
4. \(10\)
Subtopic: Coulomb's Law |
62%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Two electric dipoles of dipole moments \(1.2\times10^{-30}\) C-m and \(2.4\times10^{-30}\) C-m are placed in two different uniform electric fields of strengths \(5\times10^{4}\) NC–1 and \(15\times10^{4}\) NC–1 respectively. The ratio of maximum torque experienced by the electric dipoles is \( \dfrac{1}{x}.\) The value of \(x \) is:
| 1. | \(2\) | 2. | \(4\) |
| 3. | \(6\) | 4. | \(8\) |
Subtopic: Electric Dipole |
89%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
An isosceles right angle triangle of side \(\mathrm{d}\) is placed in a horizontal plane. A point charge \({q}\) is placed at a distance \({d}\) vertically above one of the corners as shown in the figure. The flux of the electric field passing through the triangle is:
| 1. | \(\dfrac{q}{6} \varepsilon_{0}\) | 2. | \(\dfrac{q}{18} \varepsilon_{0}\) |
| 3. | \(\dfrac{q}{24} \varepsilon_{0}\) | 4. | \(\dfrac{q}{48} \varepsilon_{0}\) |
Subtopic: Gauss's Law |
52%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The electric field, at the centre of a square with charges placed at its four vertices as shown in the figure, is: \(\left(k=\dfrac{1}{4\pi\varepsilon_0}\right)\)
| 1. | zero | 2. | \(4\dfrac{kq}{a^2}\) |
| 3. | \(2\dfrac{kq}{a^2}\) | 4. | \(2\sqrt2\dfrac{kq}{a^2}\) |
Subtopic: Electric Field |
70%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Twelve point charges each of charge \(q~\text C\) are placed at the circumference of a circle of radius \(r~\text{m}\) with equal angular spacing. If one of the charges is removed, the net electric field (in \(\text{N/C}\)) at the centre of the circle is:
(\(\varepsilon_0\text- \)permittivity of free space)
| 1. | \(\dfrac{13q}{4\pi \varepsilon_0r^2}\) | 2. | zero |
| 3. | \(\dfrac{q}{4\pi \varepsilon_0r^2}\) | 4. | \(\dfrac{12q}{4\pi \varepsilon_0r^2}\) |
Subtopic: Electric Field |
65%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Select Question Set:
© 2025 GoodEd Technologies Pvt. Ltd.