RRB GROUP D Physics Quiz - 50

Attempt now to get your rank among 3 students!

Question 1:

In which among the following, the speed of sound would be maximum?

Dry air at 0°C

Dry air at 30°C

Humid air at 0°C

Humid air at 30°C

Cobalt- 60 is commonly used in radiation therapy because it emits-

Alpha rays

Beta rays

Gamma rays

X-rays

Who established the wave nature of particles?

D-Broglie

Fermi

Pali

Clarke Maxwell

The sun makes up approximately what percent of the matter in our solar system?

17%

85%

99.8%

Consider the following statements-

1. Clear sky appears blue due to poor scattering of blue wavelength of visible light.

2. Red part of light shows more scattering than blue light in the atmosphere.

3. In the absence of atmosphere, there would be no scattering of light and sky will look black.

Which of the statement given above is/are incorrect?

Both 1 and 2

Both 2 and 3

Only 3

1,2,3