PG TRB Physics Model Question Paper with Answer - 5

Question: 21

In a rainy day, the relative humidity is ______

(A) 0%

(B) 50%

(C) 70%

(D) 100%

Question: 22

_______ is a good nuclear fuel?

(A) Neptunium – 239

(B) Plutonium – 239

(C) Uranium – 238

(D) Thorium – 236

Question: 23

A convex lens of glass has power P in air. If it is immersed in water, its power will be

(A) P

(B) More than P

(C) Less than P

(D) None of these

Question: 24

When X-rays are produced, them

(A) temperature of the target is being constant

(B) a luminous light is to seen on the target 

(C) heat is absorbed by the target

(D) heat is produced on the target

Question: 25

In automobiles ____ is used as fuel for engines.

(A) Coal

(B) Diesel or petrol

(C) Firewood

(D) Cooking gas