PG TRB Physics Online Test - 3

Question: 11

Electron beam therapy is a kind of radiation therapy to treat

(A) Enlarged prostate gland

(B) Certain types of cancer

(C) Kidney stones

(D) Gall bladder stones

Question: 12

The phenomenon of ‘total internal reflection’ is observed in which one of the following?

(A) Glowing tube light

(B) Light passing through lens

(C) Sparkling diamond

(D) Twinkling of star

Question: 13

Archimedes principle is used to find the ___ of liquids and solids.

(A) Specific gravity

(B) Weight

(C) Density

(D) Fluidity

Question: 14

Optic fibres are mainly used for which of the following?

(A) Communication

(B) Food industry

(C) Weaving

(D) Musical instruments 

Question: 15

The least distance of distinct vision for human eye is

(A) 5 cm

(B) 25 cm

(C) 75 cm

(D) 100 cm