Question is ⇒ Photoelectric emitters in photo tubes are generally made of, Options are ⇒ (A) alkali metals, (B) metals, (C) semiconductors, (D) metal and semiconductors, (E) , Leave your comments or Download question paper.

Question is ⇒ Photoelectric emitters in photo tubes are generally made of, Options are ⇒ (A) alkali metals, (B) metals, (C) semiconductors, (D) metal and semiconductors, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Photoelectric emitters in photo tubes are generally made of
A.	alkali metals [Correct Answer]
B.	metals [Wrong Answer]
C.	semiconductors [Wrong Answer]
D.	metal and semiconductors [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

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