Q:
      
      
         
            
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 gand aPare respectively  the  electrical  resistivities  of gold and aluminium, then which one of the following relations is correct?
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: D) 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
       
      
      
      
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