When A.C. current with frequency v is passed through series connection of inductor and capacitor, current obtained is maximum. Now when they are connected in parallel, current would become minimum at ……… frequency.

Options

A. v
B. `v/2`
C. 2v
D. `v^2`

Answer

A

Explanation

For series LC combination, maximum current is obtained at resonant frequency `1/(2pisqrt(LC))` there impedance minimum.
For parallel LC combination, minimum current is obtained at resonant frequency `1/(2pisqrt(LC))`
Here, impedance is maximum.
Thus, in above cases, resonant frequencies are same.