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CSAT Prelims Physics - General Knowledge Questions and Answers for UPSC Exam | Page-8

Questions
71 The tendency of liquid drop to contract and occupy minimum area is due to:
A viscosity
B density
C surface tension
D vapour pressure

Answer: Option [C]
72 For which one of the following is capillarity not the reason ?
A Blotting of ink
B Rising of underground water
C Spread a water drop on a cotton cloth
D Rising of water from the roots of a plant to its foliage

Answer: Option [B]
73 Consider the following statements:
I. Steam at 1000C and boiling water at 1000C contain same amount of heat.
II. Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
III. In an air-conditioner, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils.

Which of these statements is/are correct ?

A I and II only
B II and III only
C II only
D III only

Answer: Option [D]
74 Consider the following statements : An ordinary light bulb has a rather short life because the:
I. filament wire is not uniform.
II. bulb cannot be evacuated completely.
III. wires supporting the filament melt at high temperature.

Which of the above statements are correct ?

A I and III
B II and III
C I and II
D I, II and III

Answer: Option [D]
75 Consider the following statements: At the present level of technology available in India, solar energy can be conveniently used to:
I. Supply hot water to residential buildings.
II. Supply water for minor irrigation projects.
III. Provide street lighting.
IV. Electrify a cluster of villages and small towns.

d. Which of the statements given about is/are correct ?

A II and IV only
B I and III only
C I, II, III and IV
D I, II and III only

Answer: Option [C]
76 Consider the following statements:
I. A geo-stationary satellite is at an approximate height of 10,000 km.
II. FM transmission of music is of very good quality because the atmospheric or man made noises which are generally frequency variations can do little harm.

Which of the statements give above is/are correct ?

A I only
B II only
C Both I and II
D Neither I nor II

Answer: Option [B]
77 Consider the following statements in respect of India advance satellite INSAT-4A:
I. INSAT-4A was launched in December, 2005 from New Maxico.
II. The European Commercial Launch Service Provider Arianespace was associated with the launch of INSAT-4A.
III. Tat-sky; a digital cable service provider; is associated with DTH television broadcasting service from INSAT-4A.

Which of the statements given above are correct ?

A I, II and III
B I, and II only
C II and III only
D I and III only

Answer: Option [C]
78 In which of the following activities are Indian Remote Sensing (IRS) satellites used ?
I. Assessment of crop productivity
II. Locating groundwater resources
III. Mineral exploration
IV. Telecommunication
V. Traffic studies

Select the correct answer using the code given below.

A I, II and III only
B IV and V only
C I and II only
D I, II, III, IV and V

Answer: Option [A]
79 A car is running on a road at a uniform speed of 60 km/h. The net resulting force on the car is:
A equal to zero
B an inclined force
C driving force in the direction of car’s motion
D tresistance force opposite to the direction of car’s motion

Answer: Option [A]
80 A weightless rubber balloon is filled with 200 cc of water. Its weight in water is equal to:
A 9.8/5 N
B 9.8/10 N
C 9.8/2 N
D Zero

Answer: Option [D]
81 A solid cube gets completely immersed in water when a 0.2 kg mass is placed on it. If the mass is removed, the cube is 2 cm above the water level. What is the length of each side of the cube ?
A 12 cm
B 10 cm
C 8 cm
D 6 cm

Answer: Option [B]
82 The mass of a body on earth is 100 kg (acceleration due to gravity, ge=10m/s2). If acceleration due to gravity on the moon is ge/6 , then the mass of the body on the moon is:
A 60 kg
B 100 kg
C 100/6 kg
D 600 kg

Answer: Option [D]

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