Discussion
Match the following :
| Set I | Set II |
|---|---|
| (a) Phase controlled converter | (i) DC to DC conversion |
| (b) Chopper | (ii) DC to AC conversion |
| (c) Inverter | (iii) AC to AC conversion |
| (d) Dimmerstat | (iv) AC to DC conversion |
Answer: B
The correct code is (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii).
A phase-controlled converter (controlled rectifier) turns AC into variable DC (iv). A chopper switches a DC supply on and off rapidly to give a different average DC voltage (i). An inverter produces AC from DC (ii). A dimmerstat, a variable autotransformer, changes the magnitude of an AC voltage, AC to AC (iii).
The other codes give the chopper an AC role or treat the dimmerstat as a DC device, which does not fit how these circuits work.
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