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Physics · 2022 · 3 marks
Semiconductor Electronics: Materials, Devices and Simple CircuitsApplication of Junction Diode as a Rectifier3 marksApplyshort answer
CBSE 2022 · Region 2 · Set 1 · Q11
With the help of a circuit diagram, explain the working of a p-n junction diode as a full-wave rectifier. Also draw its input and output waveforms.
With the help of a circuit diagram, explain the working of a p-n junction diode as a full-wave rectifier. Also draw its input and output waveforms.
Marking-scheme solution
Explanation of working $\displaystyle 1$ Circuit Diagram of full wave rectifier $\displaystyle 1$ Input \
Let input voltage at A w.r.t. the centre tap at any instant is positive, then voltage at B will be negative. So, diode $\displaystyle \mathrm{D}_{1}$ gets forwarded biased & $\displaystyle \mathrm{D}_{2}$ gets reverse biased. Hence output current is obtained. When voltage at A becomes -ve ; then voltage at B would be + ve , hence $\displaystyle \mathrm{D}_{1}$, gets reverse biased & $\displaystyle \mathrm{D}_{2}$ gets forwarded biased . So output current is again obtained as shown in the figure.
Let input voltage at A w.r.t. the centre tap at any instant is positive, then voltage at B will be negative. So, diode $\displaystyle \mathrm{D}_{1}$ gets forwarded biased & $\displaystyle \mathrm{D}_{2}$ gets reverse biased. Hence output current is obtained. When voltage at A becomes -ve ; then voltage at B would be + ve , hence $\displaystyle \mathrm{D}_{1}$, gets reverse biased & $\displaystyle \mathrm{D}_{2}$ gets forwarded biased . So output current is again obtained as shown in the figure.Asked in 2 different years
- 2022 · Region 2 · Set 1 · Q11
- 2022 · Region 2 · Set 2 · Q4
- 2022 · Region 2 · Set 3 · Q5
- 2024 · Region 2 · Set 1 · Q28
- 2024 · Region 2 · Set 2 · Q28
- 2024 · Region 2 · Set 3 · Q28
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Asked in 2022 & 2024. CBSE Class 12 Physics past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.