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In the figure a capacitor of capacitance 2µF is connected to a cell of emf 20volt. The plates of the capacitor are drawn apart slowly to double the distance between them. The work done by the external agent on the plates is :
  • a)
    -400μJ
  • b)
    400μJ
  • c)
    200μJ
  • d)
    -200μJ
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
In the figure a capacitor of capacitance 2µFis connected to a ce...
Force between plates

where x is separation between plates
dW = Fdx
The correct answer is: 200μJ
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Most Upvoted Answer
In the figure a capacitor of capacitance 2µFis connected to a ce...
Force between plates

where x is separation between plates
dW = Fdx
The correct answer is: 200μJ
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In the figure a capacitor of capacitance 2µFis connected to a cell ofemf20volt. The plates of the capacitor are drawn apart slowly to double the distance between them. The work done by the external agent on the plates is :a)-400μJb)400μJc)200μJd)-200μJCorrect answer is option 'C'. Can you explain this answer?
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