TRB Old Question Papers for Physics - 3

Question: 11

When a red glass is heated in dark room it will seem

(A) Red

(B) Black

(C) Yellow

(D) Green

Question: 12

The velocity of light in vacuum or air is

(A) 2 x 10 ⁴ m/sec

(B) 9 x 10 ² m/sec

(C) 3 x 10 ¹¹ m/sec

(D) 3 x 10 ⁸ m/sec

Question: 13

The speed in colours in a rainbow on sky is primarily due to

(A) Refraction of sunlight

(B) Dispersion of sunlight

(C) Total internal reflection of sunlight

(D) Reflection of sunlight

Question: 14

Which one of the following received Nobel Prize twice for the same subject?

(A) Stanley Cohen

(B) Marie Curie

(C) Frederic Sanger

(D) Frederic Jolit

Question: 15

In Solar cooker ____ is used.

(A) Plane mirror

(B) Plane concave mirror

(C) Concave mirror

(D) Convex mirror