# A short electric dipole has a dipole moment of $$16 \times 10^{-9} ~\text{C-}\text{m}$$. The electric potential due to the dipole at a point at a distance of $$0.6~\text{m}$$ from the centre of the dipole situated on a line making an angle of $$60^{\circ}$$ with the dipole axis is: $$\left( \dfrac{1}{4\pi \varepsilon_0}= 9\times 10^{9}~\text{N-m}^2/\text{C}^2\right)$$ 1. $$200~\text{V}$$ 2. $$400~\text{V}$$ 3. zero 4. $$50~\text{V}$$

Subtopic:  Energy of Dipole in an External Field |
66%
From NCERT
NEET - 2020
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The increasing order of the electrostatic potential energies for the given system of charges is given by:

 1 $$\mathrm{a = d < b < c}$$ 2 $$\mathrm{b = d < c < a}$$ 3 $$\mathrm{b = c < a < d}$$ 4 $$\mathrm{c < a < b < d}$$
Subtopic:  Electric Potential |
77%
From NCERT
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What is the area of the plates of a $$2~\text{F}$$ parallel plate capacitor, given that the separation between the plates is $$0.5~\text{cm}$$?
1. $$1100~\text{km}^2$$
2. $$1130~\text{km}^2$$
3. $$1110~\text{km}^2$$
4. $$1105~\text{km}^2$$

Subtopic:  Capacitance |
72%
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A parallel plate air capacitor is charged to potential difference $$V$$. After disconnecting the battery, the distance between the plates of the capacitor is increased using an insulating handle. As a result the potential difference between the plates:
1. decreases.
2. increases.
3. becomes zero.
4. does not change.

Subtopic:  Capacitance |
66%
From NCERT
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If $$50~\text{J}$$ of work must be done to move an electric charge of $$2~\text{C}$$ from a point where the potential is $$-10$$ volt to another point where the potential is $$\mathrm{V}$$ volt, then the value of $$\mathrm{V}$$ is:
1. $$5$$ volt
2. $$-15$$ volt
3. $$+15$$ volt
4. $$+10$$ volt

Subtopic:  Electric Potential |
84%
From NCERT
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Some equipotential surfaces are shown in figure. The electric field at points $$A$$, $$B$$ and $$C$$ are respectively:

 1 $$1~\text{V/cm}, \frac{1}{2} ~\text{V/cm}, 2~\text{V/cm} \text { (all along +ve X-axis) }$$ 2 $$1~\text{V/cm}, \frac{1}{2} ~\text{V/cm}, 2 ~\text{V/cm} \text { (all along -ve X-axis) }$$ 3 $$\frac{1}{2} ~\text{V/cm}, 1~\text{V/cm}, 2 ~\text{V/cm} \text { (all along +ve X-axis) }$$ 4 $$\frac{1}{2}~\text{V/cm}, 1~\text{V/cm}, 2 ~\text{V/cm} \text { (all along -ve X-axis) }$$
Subtopic:  Equipotential Surfaces |
70%
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The work done to move a charge along an equipotential from $$A$$ to $$B$$:
 1 can not be defined as $$-\int_{A}^{B} { \vec E\cdot \vec{dl}}$$ 2 must be defined as $$-\int_{A}^{B} {\vec E\cdot \vec{dl}}$$ 3 is zero 4 can have a non-zero value.
Subtopic:  Equipotential Surfaces |
91%
From NCERT
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In a region of constant potential:
 a. the electric field is uniform b. the electric field is zero c. there can be no charge inside the region d. the electric field shall necessarily change if a charge is placed outside the region

Choose the correct statement(s):
1. (b) and (c)
2. (a) and (c)
3. (b) and (d)
4. (c) and (d)

Subtopic:  Relation between Field & Potential |
55%
From NCERT
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A parallel plate capacitor is made of two dielectric blocks in series. One of the blocks has thickness $$d_1$$ and dielectric constant $$K_1$$ and the other has thickness $$d_2$$ and dielectric constant $$K_2$$, as shown in the figure. This arrangement can be thought of as a dielectric slab of thickness $$d= d_1+d_2$$ and effective dielectric constant $$K$$. The $$K$$ is:

 1 $$\frac{{K}_{1} {d}_{1}+{K}_{2} {d}_{2}}{{d}_{1}+{d}_{1}}$$ 2 $$\frac{{K}_{1} {d}_{1}+{K}_{2} {d}_{2}}{{K}_{1}+{K}_{2}}$$ 3 $$\frac{{K}_{1} {K}_{2}\left({d}_{1}+{d}_{2}\right)}{{K}_{1} {d}_{2}+{K}_{2} {d}_{1}}$$ 4 $$\frac{2 {K}_{1} {K}_{2}}{{K}_{1}+{K}_{2}}$$
Subtopic:  Dielectrics in Capacitors |
67%
From NCERT
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Consider a uniform electric field in the $$z\text-$$direction. The potential is constant:
 a. in all space b. for any $$x$$ for a given $$z$$ c. for any $$y$$ for a given $$z$$ d. on the $$x\text-y$$ plane for a given $$z$$
 1 (a), (b), (c) 2 (a), (c), (d) 3 (b), (c), (d) 4 (c), (d)
Subtopic:  Equipotential Surfaces |
78%
From NCERT
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