Given below are two statements:
Statement I: When no load is connected, the filter capacitor of a rectifier stays charged to the peak voltage of the rectified output.
Statement II: Capacitor input filters are the type of filter most widely used in power supplies.
In the light of the above statements, choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Both Statement I and Statement II are correct
The filter capacitor charges while the rectified voltage rises. It can lose its charge only if a load gives it a path to discharge.
Statement I: When no load is connected, the filter capacitor of a rectifier stays charged to the peak voltage of the rectified output. — True. With no load there is no path for the charge to leave. So the capacitor keeps the peak voltage.
Statement II: Capacitor input filters are the type of filter most widely used in power supplies. — True. With a large capacitor, the output of this filter stays close to the peak of the rectified voltage. So it is the usual choice in power supplies.
NCERT (2026-27):
Application of Junction Diode as a Rectifier – “… If there is no external load, it remains charged to the peak voltage of the rectified output. …”
Application of Junction Diode as a Rectifier – “… The output voltage obtained by using capacitor input filter is nearer to the peak voltage of the rectified voltage. This type of filter is most widely used in power supplies.”