PG TRB Physics Online Test - 1

Question: 1

Fathom is the unit of

(A) Distance

(B) Sound

(C) Frequency

(D) Depth

Ans: D

Depth

Question: 2

The velocity of light was first measured by

(A) Romer

(B) Newton

(C) Galileo

(D) Einstein

Ans: A

Romer

Question: 3

Ultrasonic waves can be detected by

(A) Quincke’s tube

(B) Kundt’s tube

(C) Telephone

(D) Hebb’s method

Ans: B

Kundt’s tube

Question: 4

If the temperature inside a room is increased, the relative humidity will

(A) Decrease

(B) Increase

(C) Remain unchanged

(D) None of these

Ans: A

Decrease

Question: 5

If germanium has to be doped with a donor impurity, the foreign atom should be

(A) Trivalent

(B) Tetravalent

(C) Pentavalent

(D) None of these

Ans: C

Pentavalent

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