Question

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. $C$
• D. $nC$

Answer 1

Answer: (A)

$(n - 1)C$

Answer 2

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 $B = (n-1)C$