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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