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Electronics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsElectronics1 Mark
MCQ
Which is the wrong statement in following sentences? A device in which $P$ and $N$-type semiconductors are used is more useful then a vacuum type because
  • A
    Power is not necessary to heat the filament
  • B
    It is more stable
  • C
    Very less heat is produced in it
  • ✓
    Its efficiency is high due to a high voltage across the junction
✓

Answer

Correct option: D.
Its efficiency is high due to a high voltage across the junction

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