Polytechnic TRB Physics Model Question Paper with Answer Keys - 2

Question: 6

The thrust acting normally on unit area is called

(A) Total weight

(B) Force

(C) Weight

(D) Pressure

Question: 7

Thermosphere is the ___ layer of atmosphere above the surface of our earth.

(A) First

(B) Second

(C) Third

(D) Fourth

Question: 8

Evaporation occurs at

(A) The middle of the liquid

(B) The bottom of the liquid

(C) The surface of the liquid

(D) Both at surface and bottom of the liquid

Question: 9

The compressions and rarefactions continuously take place in

(A) Natural vibrations

(B) Longitudinal waves

(C) Forced vibrations

(D) Transverse waves

Question: 10

Which of the following effect is also called Edison effect

(A) Photoelectric effect

(B) Thermionic emission

(C) Both a and b

(D) None of these