Q11. A capacitor is made of a flat plate of area A and a second plate having a stair-like structure as shown in figure. If the area of each stair is $\frac { A } { 3 }$ and the height is $d$, the capacitance of the arrangement is : [Figure] (1) $\frac { 13 \epsilon _ { o } A } { 17 d }$ (2) $\frac { 11 \epsilon _ { 0 } \mathrm {~A} } { 18 \mathrm {~d} }$ (3) $\frac { 18 \epsilon _ { \mathrm { o } } \mathrm { A } } { 11 \mathrm {~d} }$ (4) $\frac { 11 \epsilon _ { \mathrm { o } } \mathrm { A } } { 20 \mathrm {~d} }$
Q11. A capacitor is made of a flat plate of area A and a second plate having a stair-like structure as shown in figure. If the area of each stair is $\frac { A } { 3 }$ and the height is $d$, the capacitance of the arrangement is :\\
\includegraphics[max width=\textwidth, alt={}, center]{4e2e81bd-4b90-4bb9-aa98-645235480371-02_236_367_790_205}\\
(1) $\frac { 13 \epsilon _ { o } A } { 17 d }$\\
(2) $\frac { 11 \epsilon _ { 0 } \mathrm {~A} } { 18 \mathrm {~d} }$\\
(3) $\frac { 18 \epsilon _ { \mathrm { o } } \mathrm { A } } { 11 \mathrm {~d} }$\\
(4) $\frac { 11 \epsilon _ { \mathrm { o } } \mathrm { A } } { 20 \mathrm {~d} }$