TRB Physics Previous Year Question Papers Pdf - 2

Question: 6

The special technique used in ships to calculate the depth of ocean beds is

(A) Reverberation

(B) Sonic boom

(C) LASER

(D) SONAR

Question: 7

Which one of the following forces lead to separation of the cream from the churned milk?

(A) Gravitational force

(B) Centripetal force

(C) Cohesive force

(D) Centrifugal force

Question: 8

Which one of the following materials will have maximum sound velocity?

(A) He

(B) N₂

(C) O₂

(D) H₂

Question: 9

When a liquid evaporates, its temperature

(A) Falls

(B) Rises

(C) May rise or fall depending upon the situation

(D) Does not change

Question: 10

Wavelength is

(A) The distance travelled by a wave

(B) The distance between one trough to another trough

(C) The maximum displacement of a wave

(D) The distance between one crest to another trough