An emf `E=100 sin 314 t V` is applied across a pure capacitor of `637muF`. Find
(a) the instantaneous current `I`
(b) the instantaneous power `P`
(c ) the frequency of power
(d) the maximum energy stored in the capacitor.

Explanation

Here, `C = 10 mu F = 10^(-5) F, V = 25 V`,
`L = 100 mH = 10^(-1) H, I = ?`
As `(1)/(2) LI^(2) = (1)/(2) CV^(2)`
`:. I = V sqrt((C )/(L)) = 25 sqrt((10^(-5))/(10^(-1))) = 0.25 A`