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Each plate of a parallel plate capacitor has a charge q on it. The capacitor is now connected to a battery. Now,
  • a)
     The facing surfaces of the capacitor have equal and opposite charges
  • b)
    The two plates of the capacitor have equal and opposite charges
  • c)
     The battery supplies equal and opposite charges to the two plates
  • d)
    The outer surfaces of the plates have equal charges
Correct answer is option 'A,B,D'. Can you explain this answer?
Verified Answer
Each plate of a parallel plate capacitor has a charge q on it. The cap...
(a) The facing surfaces of the capacitor have equal and opposite charges
(b) The two plates of the capacitor have equal and opposite charges
(d) The outer surfaces of the plates have equal charges
Explanation:
q-Q=q+QàQ=0
  • Please note, option (c) is incorrect the reason being why is that the battery is a source of energy not charge.
  • If a capacitor plates have equal charge on outside and equal charge on inside, then one can think that the charge on the plates must be equal so option (b) cannot be incorrect.
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Most Upvoted Answer
Each plate of a parallel plate capacitor has a charge q on it. The cap...
Explanation:

When a parallel plate capacitor is connected to a battery, several changes occur in the system. Let's go through each option to understand why options A, B, and D are correct.

a) The facing surfaces of the capacitor have equal and opposite charges:
When the capacitor is connected to a battery, the battery applies an electric potential difference (voltage) across the capacitor plates. This causes the charges on the plates to redistribute. The positive terminal of the battery attracts negative charges towards it, creating an excess of negative charge on one plate (let's call it plate A). At the same time, the negative terminal of the battery repels negative charges away from it, leaving a deficit of negative charge on the other plate (let's call it plate B). This excess and deficit of negative charge on the plates results in equal and opposite charges on the facing surfaces of the capacitor.

b) The two plates of the capacitor have equal and opposite charges:
Since the total charge on the capacitor plates is conserved, the excess of negative charge on plate A must be equal in magnitude but opposite in sign to the deficit of negative charge on plate B. This ensures that the total charge on the capacitor plates remains constant, and hence, the two plates have equal and opposite charges.

c) The battery supplies equal and opposite charges to the two plates:
As mentioned in the previous points, the battery causes the redistribution of charges on the capacitor plates. The excess of negative charge on plate A and the deficit of negative charge on plate B are supplied by the battery. The battery acts as a charge pump, supplying equal and opposite charges to the two plates of the capacitor.

d) The outer surfaces of the plates have equal charges:
Since the charges on the facing surfaces of the capacitor are equal and opposite (as explained in option A), the outer surfaces of the plates must also have equal charges. This can be understood by considering that the charges on the facing surfaces induce opposite charges on the outer surfaces. The excess of positive charge on the outer surface of plate A is induced by the excess of negative charge on its facing surface, while the deficit of positive charge on the outer surface of plate B is induced by the deficit of negative charge on its facing surface.

In summary, when a parallel plate capacitor is connected to a battery:
- The facing surfaces of the capacitor have equal and opposite charges.
- The two plates of the capacitor have equal and opposite charges.
- The battery supplies equal and opposite charges to the two plates.
- The outer surfaces of the plates have equal charges.
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Each plate of a parallel plate capacitor has a charge q on it. The capacitor is now connected to a battery. Now,a)The facing surfaces of the capacitor have equal and opposite chargesb)The two plates of the capacitor have equal and opposite chargesc)The battery supplies equal and opposite charges to the two platesd)The outer surfaces of the plates have equal chargesCorrect answer is option 'A,B,D'. Can you explain this answer?
Question Description
Each plate of a parallel plate capacitor has a charge q on it. The capacitor is now connected to a battery. Now,a)The facing surfaces of the capacitor have equal and opposite chargesb)The two plates of the capacitor have equal and opposite chargesc)The battery supplies equal and opposite charges to the two platesd)The outer surfaces of the plates have equal chargesCorrect answer is option 'A,B,D'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Each plate of a parallel plate capacitor has a charge q on it. The capacitor is now connected to a battery. Now,a)The facing surfaces of the capacitor have equal and opposite chargesb)The two plates of the capacitor have equal and opposite chargesc)The battery supplies equal and opposite charges to the two platesd)The outer surfaces of the plates have equal chargesCorrect answer is option 'A,B,D'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Each plate of a parallel plate capacitor has a charge q on it. The capacitor is now connected to a battery. Now,a)The facing surfaces of the capacitor have equal and opposite chargesb)The two plates of the capacitor have equal and opposite chargesc)The battery supplies equal and opposite charges to the two platesd)The outer surfaces of the plates have equal chargesCorrect answer is option 'A,B,D'. Can you explain this answer?.
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