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CHSE Physics Class XII

Electric Charges and Fields

Electrostatic Potential and Capacitance

Current Electricity

Moving Charges and Magnetism

Magnetism and Matter

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Ray Optics and Optical Instruments

Dual Nature of Radiation and Matter

Electronic Devices

Electric Charges and Fields

CHSE Physics Class XII
Electric Charges and Fields

CHSE Odisha Class XII Physics Chapter-1: Electric Charges and Fields Quiz.

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Question 1 of 20

1. Question

Charge on a body is an integral multiple of $\pm e$. It implies the law of

conservation of charge
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conservation of mass
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quantisation of charge
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is not related to the charging process
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Question 2 of 20

2. Question

In the process of charging, the mass of the negatively charged body

increases
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decreases
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remains constant
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is not related to the charging process
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Question 3 of 20

3. Question

The law regarding the electrostatic force between two point charges is

Ampere's law
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Coulomb's law
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Gauss' law
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Faraday's law
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Question 4 of 20

4. Question

A charge $Q$ is placed at the centre of the line joining two charges $q$ and $q$. The system of three charges will be in equilibrium if $Q$ is

$-q/3$
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$-q/2$
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$q/4$
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$-q/4$
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Question 5 of 20

5. Question

Name the physical quantity whose SI unit is $N C ^{-1}$?

electric field
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electric flux
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dipole moment
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electric potential
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Question 6 of 20

6. Question

The electrostatic force between two charges a distance $r$ apart in a vacuum is $F$. The force between the same charges a distance $r/2$ apart in a medium of dielectric constant $2$ is

$F/2$
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$4F$
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$2F$
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$F/4$
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Question 7 of 20

7. Question

The magnitude of force experienced by an electron placed at a point in the electric field $\vec{E}$ is equal to its weight $m\vec{g}$. The magnitude of $\vec{E}$ is

$mge$
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$e^2/{(mg)}$
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${mg}/e$
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${mg}/{e^2}$
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Question 8 of 20

8. Question

The value of $\frac{1}{4\pi\epsilon_0}$ in SI unit is

$9\times 10^9 \,N m^2 C^{-2}$
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$10^9 \,N m^2 C^{-2}$
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$9\times 10^9 \,N m C^{-2}$
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$10^9 \,N m C^{-1}$
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Question 9 of 20

9. Question

The dimension of electric permittivity is

$[M^{-1} L^{-2} T^3 A^2]$
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$[M^{-1} L^{-3} T^4 A^2]$
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$[M L^{2} T^{-1} A^{-2}]$
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$[M^2 L T^{-2} A^{-3}]$
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Question 10 of 20

10. Question

The SI unit of electric dipole moment is

Coulomb-meter
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Newton/Coulomb
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Joule/Coulomb
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Coulomb-Newton
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Question 11 of 20

11. Question

The electric field due to an electric dipole at a distance $r$ from its centre is directly proportional to

$\frac{1}{r^3}$
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$\frac{1}{r^2}$
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$\frac{1}{r}$
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$\frac{1}{r^4}$
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Question 12 of 20

12. Question

The ratio of the electric field intensity due to an electric dipole at an axial point to that at an equatorial point at the same distance from the centre is

$1:1$
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$2:1$
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$1:2$
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$4:1$
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Question 13 of 20

13. Question

The negative and positive charges of a dipole of dipole moment $\vec{p}$ are placed respectively at points $\hat{i}a$ and $+\hat{i}a$. If $y>>a$, then the electric field intensity due to the dipole at the point located at $\hat{j}y$ is

$\vec{p}\ {2 \pi \epsilon_0 y^3}$
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$-\vec{p}\ {2 \pi \epsilon_0 y^3}$
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$\vec{p}\ {4 \pi \epsilon_0 y^3}$
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$-\vec{p}\ {4 \pi \epsilon_0 y^3}$
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Question 14 of 20

14. Question

An electric dipole placed in a non-uniform electric field will experience

only a force
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only a torque
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both force and torque
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neither force nor torque
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Question 15 of 20

15. Question

The dimension of electric flux is

$[M L T^{-2} A]$
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$[M L^3 T^{-3} A^{-1}]$
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$[M^{-1} L^{-1} T^{3} A]$
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$[M^2 L T^{-2} A^{-1}]$
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Question 16 of 20

16. Question

Which statement is true for Gauss’s law?

All the charges, whether inside or outside the Gaussian surface, contribute to the electric flux.
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Electric flux depends upon the geometry of the Gaussian surface.
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Gauss's theorem can be applied to a non-uniform electric field.
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The electric field over the Gaussian surface remains continuous and uniform at every point.
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Question 17 of 20

17. Question

A charge $q$ is placed at the centre of a cube. The electric flux through any one of its faces is

$\frac{q}{6\epsilon_0}$
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$\frac{q}{\epsilon_0}$
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$\frac{q}{2\epsilon_0}$
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$\frac{2q}{\epsilon_0}$
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Question 18 of 20

18. Question

Due to the presence of a point charge at the centre of a spherical Gaussian surface of diameter $a$, $10^6 Nm^2/C$ amount of electric flux passes through it. Keeping the point charge at the centre, the Gaussian surface is changed to a cubical Gaussian surface of side $a$. The flux through the new Gaussian surface will be

$\sqrt{2}\times 10^6 Nm^2/C$
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$10^6\sqrt{2} Nm^2/C$
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$10^6 Nm^2/C$
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$2\sqrt{2}\times 10^6 Nm^2/C$
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Question 19 of 20

19. Question

The electric field intensity near a uniformly charged infinite plane thin non-conducting sheet with charge density $+\sigma$ placed in air is

$+\frac{\sigma}{\epsilon_0}$
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$+\frac{2\sigma}{\epsilon_0}$
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$+\frac{3\sigma}{\epsilon_0}$
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$+\frac{\sigma}{2\epsilon_0}$
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Question 20 of 20

20. Question

Two infinite parallel plates carry equal but opposite uniform charge density $\pm \sigma$. The electric fields between and outside the plates, respectively, are

$\frac{\sigma}{\epsilon_0}$ and $0$
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$\frac{\sigma}{2\epsilon_0}$ and $0$
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$0$ and $\frac{\sigma}{\epsilon_0}$
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$0$ and $\frac{\sigma}{2\epsilon_0}$
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