TRB Assistant Professor Previous Year Question Paper - 5

Question: 21

Non metals are bad conductors of electricity because

(A) they lack free or mobile electrons

(B) they have light atoms

(C) they have high melting point

(D) all of these

Question: 22

If the glass rod is rubbed with silk

(A) negative

(B) positive

(C) neutral

(D) no charge

Question: 23

In a three pin plug, the longest pin should be connected to

(A) Live terminal

(B) Neutral terminal

(C) Any terminal

(D) Ground terminal

Question: 24

An object weights the maximum in

(A) air

(B) water

(C) vacuum

(D) hydrogen

Question: 25

Which of the following are the discoveries of Albert Einstein?

(A) Radioactivity and photoelectric effect

(B) Theory of relativity and photoelectric effect

(C) Radioactivity and theory of relativity

(D) X-rays and photoelectric effect