Thursday, February 27, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

Physics questions and answers For UPSC | SSC | Rail | RRB | State PSC P28


Page 28

80039271. In a Laser (say neon laser) all the atoms emit the light waves of
A
Same frequency
B
Same amplitude
C
Same phase
D
All of the above
D
Correct Answer: D. All of the above
80033272. Holography is a technique of
A
recording a permanent, sharp two-dimensional black and white or multicolor photograph
B
recording a permanent three-dimensional multicolor photograph
C
recording a permanent three-dimensional black and white photograph
D
recording a permanent three-dimensional photograph of a given single color or a multicolor
D
Correct Answer: D. recording a permanent three-dimensional photograph of a given single color or a multicolor
80018273. An ice block with a piece of lead embedded in it floats in water, if the ice melts the water level
A
Rises
B
Falls
C
Remains same
D
Falls first and then rues
B
Correct Answer: B. Falls
80120274. Which among the following is the fundamental quantity?
A
Volume
B
time
C
Velocity
D
Force
B
Correct Answer: B. time
80131275. Which of the following is used in the oven?
A
X-rays
B
UV rays
C
Microwaves
D
Radiowaves
C
Correct Answer: C. Microwaves
80034276. How many calories of energy are released by a boiled egg?
A
40
B
50
C
60
D
77
D
Correct Answer: D. 77
80056277. Raindrops fall from a great height. Which among the following statements is true regarding it?
A
they fall with that ultimate velocity, which is different for different droplets
B
they fall with the same ultimate velocity
C
their velocity increases and they fall with different velocity on the earth
D
their velocity increases and they fall with the same velocity on the earth
A
Correct Answer: A. they fall with that ultimate velocity, which is different for different droplets
80006278. A fountain pen works on the principle of
A
flow of liquids from higher to lower potential
B
capillary action
C
Bernoulli's principle
D
Viscosity of liquids
B
Correct Answer: B. capillary action
80127279. Which of the following instruments is used to measure humidity?
A
Kata Thermometer
B
Anemometer
C
Sling Psychrometer
D
Clinical Thermometer
C
Correct Answer: C. Sling Psychrometer
80110280. When a barometer reading suddenly recedes, it indicates that climate
A
will be very warm
B
will be extremely stormy
C
will remain cold
D
incessant rain for at least 48 hours
B
Correct Answer: B. will be extremely stormy



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