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 |
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The electric potential difference between two parallel plates is $$2000 ~\mathrm V$$. If the plates are separated by $$2~ \mathrm {mm}$$, what is the magnitude of the electrostatic force on a charge of $$4 \times 10^{-6}~ \mathrm C$$located midway between the plates?

 1 $$4~\mathrm N$$ 2 $$6~\mathrm N$$ 3 $$8~\mathrm N$$ 4 $$1.5 \times 10^{-6}~ \mathrm N$$
Subtopic:  Capacitance |
70%
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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 |
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A parallel plate air capacitor has a capacity of C, the distance of separation between plates is d and potential difference V is applied between the plates. The force of attraction between the plates of the parallel plate air capacitor is:

1. $\frac{{C}^{2}{V}^{2}}{2d}$

2. $\frac{C{V}^{2}}{2d}$

3. $\frac{C{V}^{2}}{d}$

4. $\frac{{C}^{2}{V}^{2}}{2{d}^{2}}$

Subtopic:  Capacitance |
67%
From NCERT
NEET - 2015
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In the given figure if , each plate of the capacitor has a surface area of  and the plates are  apart, then the number of excess electrons on the negative plate is:

1. $5.15×{10}^{9}$

2. $2.21×{10}^{10}$

3. $3.33×{10}^{9}$

4. $2.21×{10}^{9}$

Subtopic:  Capacitance |
65%
From NCERT
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The electrostatic force between the metal plates of an isolated parallel plate capacitor $$C$$ having a charge $$Q$$ and area $$A$$ is:

 1 independent of the distance between the plates 2 linearly proportional to the distance between the plates 3 proportional to the square root of the distance between the plates 4 inversely proportional to the distance between the plates
Subtopic:  Capacitance |
60%
From NCERT
NEET - 2018
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A parallel plate capacitor is connected to a battery as shown in the figure. Consider two situations.

 A: Key K is kept closed and plates of capacitors are moved apart using the insulating handle. B: Key K is opened and plates of capacitors are moved apart using the insulating handle.

Choose the correct option(s):

 a. In A, Q remains the same but C changes. b. In B, V remains the same but C changes. c. In A, V remains the same and hence Q changes. d. In B, Q remains the same and hence V changes.

1. a and b
2. a and d
3. b and c
4. c and d

Subtopic:  Capacitance |
58%
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The figure shows charge ($$q$$) versus voltage ($$V$$) graph for series and parallel combination of two given capacitors. The capacitances are:

1. $$50$$ $$\mu F$$ and $$30$$ $$\mu F$$
2. $$20$$ $$\mu F$$ and $$30$$ $$\mu F$$
3. $$60$$ $$\mu F$$ and $$40$$ $$\mu F$$
4. $$40$$ $$\mu F$$ and $$10$$ $$\mu F$$
Subtopic:  Capacitance |
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Choose the correct statements among the following:
 A: Free electrons move always from a region of higher potential to a region of lower potential. B: The capacitance of the capacitor does not depend upon the nature of the conducting material of the plates of the capacitor.

 1 only A 2 only B 3 both A and B 4 neither A and B
Subtopic:  Capacitance |
From NCERT
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