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 Solution From the formula, \[C=\frac{{{\varepsilon }_{0}}A}{d-t+\frac{t}{K}}\] 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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