Resonance frequency
The above left is an RLC series circuit, where the resistance of the resistor, the self-inductance of the inductor and the capacitance of the capacitor are
,
and
, respectively. The above right shows the current intensity as a function of the frequency of the AC power supply, where
is the resonance frequency of this circuit. Which of the following methods can make the resonance frequency greater than
?
a) Replacing the inductor with one that has an inductance greater than
b) Replacing the capacitor with one that has a conductance greater than
c) Connecting more capacitors with capacitance
in series to the existing capacitor.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
Since resonance frequency is inversely proportional to square root of LC ,hence adding capacitors in series will decrease the net capacitance hence answer is (c) .