PG TRB Model Question Paper for Physics with Answer - 2

Question: 6

The blue colour of sky is due to the phenomenon of

(A) Dispersion

(B) Scattering

(C) Refraction

(D) Reflection

Question: 7

If the doors of a refrigerator are left open for a few hours, the room temperature will

(A) Increase

(B) Decrease

(C) Remain the same

(D) Decrease only in the area in the vicinity of the refrigerator

Question: 8

Where should an object be placed so that a real and inverted image of the same size is obtained using a convex lens?

(A) At infinity

(B) At twice the focal length

(C) At the focus

(D) Between the lens and its focus

Question: 9

The bases of cooking vessels are painted ___ in order to absorb more heat.

(A) black

(B) red

(C) green

(D) white

Question: 10

Photoelectric effect was discovered by

(A) Hertz

(B) Plank

(C) Bohr

(D) Einstein