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Hassan
1.An example of a perfectly plastic body is?
A. Quartz
B. Crystal
C. Putty
D. Quartz
2.A given quantity if an ideal gas is at pressure P and absolute temperature T. What is the isothermal bulk modulus of the gas?
A. 2P/3
B. P
C. 3P/2
D. 2P/3
3.A wire fixed at the upper end stretches by length l by applying a force F. What is the work done in stretching?
A. F/2l
B. Fl
C. 2Fl
D. F/2l
4.The term liquid crystal refers to a state that is intermediate between?
A. Crystalline solid and amorphous liquid
B. Crystalline solid and vapour
C. Amorphous liquid and its vapour
D. Crystalline solid and amorphous liquid
5.Which of the following have well defined geometrical external shapes?
A. Amorphous solids
B. Liquids
C. Gases
D. Amorphous solids
6.A body of weight mg is hanging on a string that extends in length by l. The work done in extending the string is?
A. mgl
B. mgl/2
C. mgl/2
D. mgl
7. At what speed will the velocity head of stream of water be 40 cm?
A. 2.80cms-1
B. 280 cms-1
C. 28 cms-1
D. 2.80cms-1
8.If there were no gravity, which of the following will not be there for a fluid?
A. Viscosity
B. Surface tension
C. Pressure
D. Viscosity
9.Motion of a liquid in a tube is best described by?
A. Bernoulli theorem
B. Poiseuille’s equation
C. Stoke’s law
D. Bernoulli theorem
10.Critical velocity of the liquid?
A. Decrease when radius decreases
B. Increases when radius increases
C. Decreased when density increases
D. Decrease when radius decreases
11.A steel ball is dropped in oil, then?
A. The ball attains constant velocity after sometime
B. The ball stops
C. The speed of ball will keep on increasing
D. The ball attains constant velocity after sometime
12.An aeroplane gets its upward lift due to a phenomenon described by the?
A. Archimedes’ principle
B. Bernoulli’s principle
C. Buoyancy principle
D. Archimedes’ principle
13.The rate of flow of liquid through an orifice of a tank does not depend upon?
A. The size of the orifice
B. Density of liquid
C. The height of fluid column
D. The size of the orifice
14.The velocity of efflux of a liquid through an orifice in the bottom of the tank does not depend upon?
A. Size of orifice
B. Height of liquid
C. Acceleration due to gravity
D. Size of orifice
15.A body of mass 15kg is dropped into the water. If the apparent weight of the body is 107N, then the applied thrust will be?
A. 40 N
B. 80 N
C. 60 N
D. 40 N
16.The mass of the moon is 1% of the mass of the earth. The ratio of gravitational pull on moon and that of moon in earth will be ?
A. 1:1
B. 1:10
C. 1:100
D. 1:1
17.If the earth loses its gravity, then for a body ?
A. Weight becomes zero
B. Mass becomes zero
C. Neither mass nor weight is zero
D. Weight becomes zero
18.A ball is dropped from a spacecraft revolving around the earth at a height of 120km. What will happen to the ball?
A. It will go very far in the space
B. It will move with the same speed tangentially to the spacecraft
C. It will fall down to the earth gradually
D. It will go very far in the space
19.The velocity with which a projectile must be fired so that it escapes the earth’s gravitational field doesn’t depend on?
A. Mass of the earth
B. Mass of the projectile
C. Radius of the orbit
D. Mass of the earth
20.The escape velocity of a projectile from the earth is approximately?
A. 7km/sec
B. 11.2km.sec
C. 112km/sec
D. 7km/sec
21.What is Black hole?
A. Super surface of the atmosphere
B. Ozone layer
C. Super dense planetary material
D. Super surface of the atmosphere
22.If the orbital radius of the earth is made 4 times, then find the duration of the year if earlier it was T?
A. T
B. 2T
C. 4T
D. T
23.If radius of the earth is reduced, then?
A. Time duration is reduced
B. Earth rotates slower
C. Time period of earth decreases
D. Time duration is reduced
24.A point mass m is placed inside a spherical shell of radius R and mass M at a distance R/2 from the centre of the shell. The gravitational force exerted by the shell on the point mass is?
A. GMm/R2
B. GMm/R
C. Zero
D. GMm/R2
25.A man is standing on an international space station which is orbiting earth at an altitude 520km with a constant speed 7.6km/s. If the man’s weight is 50kg, his acceleration is?
A. 7.6 km/s2
B. 7.6 m/s2
C. 8.4 m/s2
D. 7.6 km/s2
26.Same material is used to make a sphere, a cube and a thin circular plate and having the same mass. They are initially heated to a temperature of 3000°C. Which of these will cool fast?
A. Sphere
B. Cube
C. Plate
D. Sphere
27.Heat was given to a body, which raises its temperature by 1°C is?
A. Water equivalent
B. Temperature gradient
C. Thermal capacity
D. Water equivalent
28.If boiling point of water is 95°F, what will be reading at Celsius scale?
A. 7°C
B. 65°C
C. 63°C
D. 7°C
29.50g of ice at 0°C is mixed with 50g of water at 80°C, what will be the final temperature of a mixture?
A. 0°C
B. 40°C
C. 60°C
D. 0°C
30.The Wien’s displacement law expresses a relation between?
A. Wavelength corresponding to maximum energy and absolute temperature
B. Radiated energy and wavelength
C. Temperature and emissive power
D. Wavelength corresponding to maximum energy and absolute temperature
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