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A parallel plate capacitor is made by stacking n equally spaced plates connected alternatively. If the capacitance between any two adjacent plates is 'C' then the resultant capacitance is (a) (n+1) C(b) (n -1 )C(c) nC(d) C
(b) As n plates are joined, it means (n-1) combination joined in parallel. ? resultant capacitance = (n – 1 ) C
(b) As n plates are joined, it means (n-1) combination joined in parallel.
Each plate is taking part in the formation of two capacitors except the plates at the ends. These capacitors are in parallel and n plates form (n -1) capacitors.Thus, equivalent capacitance between A and B = (n -1) C
We know that when we connect 4 capacitors each of capacitance Calternately,it performs like 3 capacitors in parallel i.e.(4-1)C.So n capacitors will be equivalent to (n-1)C.
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