A capacitor is made of two square plates each of side 'a' making a very small angle α between them, as shown in figure. The capacitance will be close to :
1
\(\frac{\epsilon_0 \text{a}^2}{\text{d}}\left(1−\frac{3 \alpha \text{a}}{2\text{d}}\right)\)
2
\(\frac{\epsilon_0 \text{a}^2}{\text{d}}\left(1−\frac{\alpha \text{a}}{2\text{d}}\right) \)
3
\(\frac{\epsilon_0 \text{a}^2}{\text{d}}\left(1+\frac{\alpha \text{a}}{\text{d}}\right)\)
4
\(\frac{\epsilon_0 \text{a}^2}{\text{d}}\left(1−\frac{\alpha \text{a}}{4\text{d}}\right) \)