NAT I Engineering Physics With Answers

image
image
image

NAT I Engineering Physics

Sr. # Questions Answers Choice
1 The twinkling of stars is due to The fact that stars do not emit light continuously The refractive index of the earth's atmosphere fluctuate Intermittent absorption of star light by its own atmosphere None of them
2 A prism splits a beam of white light into its seven constituent colors this is so because Phase of different colors is different Amplitude of different colors is different Energy of different colors is different Velocity of different colors is different
3 A sun rise or sun set, the sun looks reddish because. The sun is coldest at these times Of the effects of reflection and refraction The sun is hottest at these times Of the scattering of light
4 One cannot see through fog because Fog absorbs light The refractive index of fog is infinity Light suffers total reflection at the droplet in a fog Light is scattered by the droplets in fog
5 The distance between node and anti-node is λ λ/2 λ/4 2λ
6 Mechanical waves on the surface of a liquid are Transverse Longitudinal Torsional Both transverse and longitudinal
7 Velocity of sound in a diatomic as is 300 m/sec what is its rms velocity 400 m/sec 40 m/sec 430 m/sec 300 m/sec
8 At a certain instant a stationary transverse wave is found to have maximum kinetic energy the appearance of string of that instant is: Sinusoidal shape with amplitude A/3 Sinusoidal shape with amplitude A/2 Sinusoidal shape with amplitude A Straight line
9 With the propagation of a longitudinal wave through a material medium the quantities transmitted in the propagation direction are Energy momentum and mass Energy Energy and mass Energy and linear momentum
10 If the amplitude of sound is doubled and the frequency reduced to one-fourth the intensity of sound at the same point will be Increasing by a factor of 2 Decreasing by a factor of 2 Decreasing by a factor of 4 Unchanged
Download This Set
×