A) decreases
B) remains unchanged
C) becomes infinite
D) increases
Correct Answer: B
Solution :
Aluminium is a metal, so when we insert an aluminium foil, equal and opposite charges appear on its two surfaces. Since, it is of negligible thickness, it will not effect the capacitance. Alternative: From the formula, \[C=\frac{{{\varepsilon }_{0}}A}{d-t+\frac{t}{K}}\] \[\Rightarrow \] Here,\[K=\infty \]and\[t\to 0\] So, \[C=\frac{{{\varepsilon }_{0}}A}{d+0}=\frac{{{\varepsilon }_{0}}A}{d}={{C}_{0}}\]You need to login to perform this action.
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