Q. 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
D) Its efficiency is high due to a high voltage across the junction
Explanation
The correct answer is Option D: Its efficiency is high due to a high voltage across the junction.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.