What is the relationship of the addition of a capacitor to the number of oscillations a tank circuit produces?

Question

In our laboratory experiment about PRACTICAL TANK CIRCUITS, when we added a capacitor in parallel with the LC circuit, the number of oscillations (obtained from the oscilloscope) decreased! When an inductor is added in parallel with the LC circuit the number of oscillations increased!! What could be the reason behind all these? Please if anyone can explain in detail...

Thank you very much n advance for your time and shared knowledge!!! GOD bless you all!!! ^_^

Answer 1

Adding a capacitor in parallel increases the capacitance and, therefore, lowers the resonant frequency.

Adding an inductor in parallel decreases the inductance and, therefore, increases the resonant frquency

Freq = sqrt(1/(LC))

Note that an increase in either L or C will decrease the frequency, while a decrease in either will increase the frequency. I trust that you already know how to compute the capacitance of capacitors and inductors in parallel .

Answer 2

As adding capacitor in parallel,the total capacitance increase in the LC circuit. therefore it turns into lower frequency.

As adding coil in parallel, the total inductance decrease in the LC circuit,therefore it turns into higher frequency.