Which of the following filter circuit results in best voltage regulation?

Voltage Regulator :

• The circuit which is used to maintain a constant output voltage.
• The usage of filter circuit in any application is to dampen the fluctuations or the variations in the concerned signal.
• The filter circuits are used in order to bypass the voltage fluctuations and thereby to improve the accuracy of the regulator circuit.

​

Choke Filter :

The inductor is connected to rectifier output.

In choke filter best voltage regulation is obtained.

Hence correct option is "1"