Electric Charges and Fields

By info@ashirbadmohanty.in / June 26, 2025

CHSE Physics Class XII
Electric Charges and Fields

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Question 1 of 10

1. Question

The dimension of electric permitivity 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 2 of 10

2. 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 3 of 10

3. Question

The ratio of electric field intensity due to an electric dipole at an axial point to that at an equatorial point at the same distance from 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 4 of 10

4. 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 5 of 10

5. 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 6 of 10

6. 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 7 of 10

7. 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 8 of 10

8. Question

Force $\vec{F}$ between two charges $Q_1$ and $Q_2$ separated by $r$ is $25N$. It can be reduced to $5N$ if the separation between them is made

$\frac{r}{\sqrt{5}}$
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$\frac{r}{2}$
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$\sqrt{5}r$
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$2r$
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Question 9 of 10

9. Question

If $F_e$ and $F_g$ are the electric and gravitational forces respectively between an electron and proton situated at a distance apart, the ratio of $F_e$ and $F_g$ is of the order of

$10^{39}$
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$10^{-39}$
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$10^{-19}$
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$10^{19}$
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Question 10 of 10

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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