A) decreases
B) remains unchanged
C) becomes' infinite
D) increases
Correct Answer: A
Solution :
[b] 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, \[C=\frac{{{\varepsilon }_{0}}A}{d+0}=\frac{{{\varepsilon }_{0}}A}{d}={{C}_{0}}\] |
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