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Plate A of a parallel air filled capacitor is connected to a spring having force constant k and plate B is fixed. If a charge +q is placed on plate A and charge _q on plate B then find out extension in spring in equilibrim. Assume area of plate is `A'
  • a)
  • b)
  • c)
  • d)
    none of these
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Plate A of a parallel air filled capacitor is connected to a spring ha...

At equilibrium,
Felectric=Fspring
qE=kx ____(1)
we know that,
C=Q/V
And V=ε.d
C=Aε0/d
Therefore, ε=θ/Aε0
Here, ε=q/ Aε0
Putting the value in the equation (1)
q/ Aε0=kx
x=q2/akε0
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Most Upvoted Answer
Plate A of a parallel air filled capacitor is connected to a spring ha...

At equilibrium,
Felectric=Fspring
qE=kx ____(1)
we know that,
C=Q/V
And V=ε.d
C=Aε0/d
Therefore, ε=θ/Aε0
Here, ε=q/ Aε0
Putting the value in the equation (1)
q/ Aε0=kx
x=q2/akε0
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Community Answer
Plate A of a parallel air filled capacitor is connected to a spring ha...
F=kx where k is force constant and x is elongation in the spring and F is the net force between the two plates in this question.

The formula for net force between the two plates is Q^2/2A£not

where A is the area of the plate
hence x=F/k
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Plate A of a parallel air filled capacitor is connected to a spring having force constant k and plate B is fixed. If a charge +q is placed on plate A and charge _q on plate B then find out extension in spring in equilibrim. Assume area of plate is `A'a)b)c)d)none of theseCorrect answer is option 'C'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Plate A of a parallel air filled capacitor is connected to a spring having force constant k and plate B is fixed. If a charge +q is placed on plate A and charge _q on plate B then find out extension in spring in equilibrim. Assume area of plate is `A'a)b)c)d)none of theseCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Plate A of a parallel air filled capacitor is connected to a spring having force constant k and plate B is fixed. If a charge +q is placed on plate A and charge _q on plate B then find out extension in spring in equilibrim. Assume area of plate is `A'a)b)c)d)none of theseCorrect answer is option 'C'. Can you explain this answer?.
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