The following parts are used in a centre-tap full-wave rectifier with a capacitor filter.
Match List-I with List-II.
| List-I | List-II |
|---|---|
| (A) Junction diode | (I) The output is taken between this point and the centre tap |
| (B) Centre-tap transformer | (II) Smooths the pulsating output voltage |
| (C) Capacitor connected across \(R_L\) | (III) Allows current only when it is forward biased |
| (D) Common point of the n-sides of the two diodes | (IV) Gives the two diodes voltages that are out of phase |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
(A) Junction diode — This matches (III). A diode lets current pass only when it is forward biased. This one-way action rectifies the ac.
(B) Centre-tap transformer — This matches (IV). When end A of the secondary is positive with respect to the centre tap, end B is negative. So the two diodes get voltages that are out of phase and conduct in turn.
(C) Capacitor connected across \( R_L \) — This matches (II). It charges at each peak and discharges slowly through the load, so the pulsating output becomes nearly steady.
(D) Common point of the n-sides of the two diodes — This matches (I). The output of the rectifier appears between this point and the centre tap of the secondary.
NCERT (2026-27):
Application of Junction Diode as a Rectifier – “From the V-I characteristic of a junction diode we see that it allows current to pass only when it is forward biased. …”
Application of Junction Diode as a Rectifier – “… Suppose the input voltage to A with respect to the centre tap at any instant is positive. It is clear that, at that instant, voltage at B being out of phase will be negative …”
Application of Junction Diode as a Rectifier – “… To get steady dc output from the pulsating voltage normally a capacitor is connected across the output terminals (parallel to the load RL). …”
Application of Junction Diode as a Rectifier – “… The n-side of the diodes are connected together and the output is taken between this common point of diodes and the midpoint of the secondary of the transformer. …”