Match List-I with List-II.
| List-I | List-II |
|---|---|
| (A) Voltages at the two ends A and B of a centre-tap secondary, measured from the centre tap | (I) Pulses in every half-cycle, each shaped like half a sine wave |
| (B) Output of a half-wave rectifier | (II) A nearly steady voltage close to the peak value |
| (C) Output of a full-wave rectifier without a filter | (III) Out of phase with each other |
| (D) Output of a full-wave rectifier with a capacitor filter | (IV) Pulses only in alternate half-cycles, with gaps between them |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
(A) Voltages at the two ends A and B of a centre-tap secondary, measured from the centre tap — This matches (III). When A is positive, B is negative at the same instant, so the two voltages are out of phase.
(B) Output of a half-wave rectifier — This matches (IV). The single diode conducts only in the half-cycles in which it is forward biased. So a pulse comes in one half-cycle and the next half-cycle is empty.
(C) Output of a full-wave rectifier without a filter — This matches (I). The two diodes conduct in turn, so a pulse shaped like half a sine wave comes in every half-cycle.
(D) Output of a full-wave rectifier with a capacitor filter — This matches (II). The capacitor charges to the peak and falls only a little before the next pulse. So the output stays close to the peak value.
NCERT (2026-27):
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 – “If an alternating voltage is applied across a diode in series with a load, a pulsating voltage will appear across the load only during the half cycles of the ac input during which the diode is forward biased. …”
Application of Junction Diode as a Rectifier – “The rectified voltage is in the form of pulses of the shape of half sinusoids. Though it is unidirectional it does not have a steady value. …”
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. …”