- 1(current)
Q. No.A parallel plate capacitor is connected to a battery as shown in the figure. Consider two situations.
Choose the correct option(s).
1. (a), (b) only
2. (b), (c) only
3. (a), (c), (d) only
4. (c), (d) only
| A: | Key \(K\) is kept closed and plates of capacitors are moved apart using insulating handle. |
| B: | Key \(K\) is opened and plates of capacitors are moved apart using the insulating handle. |
Then:
| (a) | In A: \(Q\) remains same but \(C\) changes. |
| (b) | In B: \(V\) remains same but \(C\) changes. |
| (c) | In A: \(V\) remains same and hence \(Q\) changes. |
| (d) | In B: \(Q\) remains same and hence \(V\) changes. |
1. (a), (b) only
2. (b), (c) only
3. (a), (c), (d) only
4. (c), (d) only
Subtopic: Â Capacitance |
 67%
From NCERT
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A parallel plate capacitor \((C)\) is charged by connecting it to a battery (EMF \(E\)). A dielectric slab is inserted into the space between the plates.
Choose the correct answer from the options given below:
| (I) | The charge on the plates increases. |
| (II) | The energy stored in the capacitor increases. |
| (III) | Work is done by the battery as the slab is inserted. |
Choose the correct answer from the options given below:
| 1. | (I), and (II) are True. |
| 2. | (I) and (III) are True. |
| 3. | only (I) is True. |
| 4. | (I), (II), and (III) are True. |
Subtopic: Â Capacitance |
 64%
From NCERT
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Consider a spherical conductor of radius \(r\), centred at the point \(O\). A point charge \(q(q>0)\) is placed outside the sphere, at a distance '\(d\)' from its centre \((O)\) \((d>r)\) and the sphere is earthed.
Given below are two statements:
Given below are two statements:
| Assertion (A): | The electric flux due to the external charge \(q\) and the induced charges on the sphere through the spherical surface \(S\) shown dotted in the diagram, is \(\left(-\dfrac{q}{\varepsilon_0}\right)\). |
| Reason (R): | Negative charges are induced on the surface of the conducting sphere due to the positive charge \(q\) in the vicinity, and the potential of the conducting sphere is zero. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Â Capacitance |
 50%
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Absolute potential at any point is meaningful only when some reference level for the potential is defined. |
| Reason (R): | The capacitance of any parallel plate capacitor depends on the charge on the capacitor and the voltage applied across the plates. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Capacitance |
 64%
From NCERT
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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. \(50~\mu\text{F}\) and \(30~\mu\text{F}\)
2. \(20~\mu\text{F}\) and \(30~\mu\text{F}\)
3. \(60~\mu\text{F}\) and \(40~\mu\text{F}\)
4. \(40~\mu\text{F}\) and \(10~\mu\text{F}\)
1. \(50~\mu\text{F}\) and \(30~\mu\text{F}\)
2. \(20~\mu\text{F}\) and \(30~\mu\text{F}\)
3. \(60~\mu\text{F}\) and \(40~\mu\text{F}\)
4. \(40~\mu\text{F}\) and \(10~\mu\text{F}\)
Subtopic: Â Capacitance |
 50%
From NCERT
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- 1(current)
Q. No.
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