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  • Question
  • A parallel-plate capacitor of capacitance C1is made using two gold plates. Another parallel-plate capacitor of capacitance C2is made using two aluminium plates with same plate separation, and all the four plates are of same area. If g?and aPare respectively the electrical resistivities of gold and aluminium, then which one of the following relations is correct?


  • Options
  • A. C1>C2
  • B. C2>C1
  • C. C1pa = C2pg
  • D. C1 = C2

  • Correct Answer
  • C1 = C2 

    Explanation

    C1= capacitance of gold plates

    C2=   capacitance   of   aluminium plates

    rg= Gold?s resistivity

    ra= Aluminium?s resistivity

    As the capacitance depends on the shape,  size  &  geometrical  placing of  the  conductors  &  the  medium between them, hence, the value of capacitance  will  be  independent  of resistivity. Therefore, C1= C2

  • Tags: Bank Exams

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