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Question and Solution 1 of 50
1. Question
1. When the temperature of liquid increases, its surface tension
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Question and Solution 2 of 50
2. Question
2. A gas at a volume of V0 in a container at pressure P0 is compressed to onefifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant?
CorrectIncorrect 
Question and Solution 3 of 50
3. Question
3. A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends. If the fulcrum is at the centre of gravity, the force that must be applied at its other end to keep it in horizontal equilibrium is
CorrectIncorrect 
Question and Solution 4 of 50
4. Question
4. The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions of 20Â°C and 80Â°C respectively is
CorrectIncorrect 
Question and Solution 5 of 50
5. Question
5. A hose of crosssectional area 0.5m2 is used to discharge water from a water thank at a velocity of 60ms1 in 20s into a container. If the container is filled completely, the volume of the container is
CorrectIncorrect 
Question and Solution 6 of 50
6. Question
6. A force of 100N is used to kick a football of mass 0.8kg. Find the velocity with which the ball moves if it takes 0.8s to be kicked.
CorrectIncorrect 
Question and Solution 7 of 50
7. Question
7. A catapult used to hold a stone of mass 500g is extended by 20cm with an applied force F. If the stone leaves with a velocity of 40m/s, the value of F is
CorrectIncorrect 
Question and Solution 8 of 50
8. Question
8. The inner diameter of a test tube can be measured accurately using a
CorrectIncorrect 
Question and Solution 9 of 50
9. Question
9. Particles of mass 102kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad1. If the radius of the blade is 0.2m, the centripetal force is
CorrectIncorrect 
Question and Solution 10 of 50
10. Question
10. A lead bullet of mass 0.05kg is fired with a velocity of 200ms1 into a lead block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is
CorrectIncorrect 
Question and Solution 11 of 50
11. Question
11.
I. Temperature.
II. Density of air molecules
III. Pressure
IV. Pitch
Which of the above will affect the velocity of sound in the airCorrectIncorrect 
Question and Solution 12 of 50
12. Question
12. A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in the engine is
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Question and Solution 13 of 50
13. Question
13. When the brakes in a car are applied, the frictional force on the tyres is
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Question and Solution 14 of 50
14. Question
14. If the stress on a wire is 107NM2 and the wire is stretched from its original length of 10.00 cm to 10.05 cm. The young’s modulus of the wire is
CorrectIncorrect 
Question and Solution 15 of 50
15. Question
15. A solid weigh 10 .00 N in air, 6 N when fully immersed in water and 7.0 N when fully immersed in a liquid X. Calculate the relative density of the liquid, X.
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Question and Solution 16 of 50
16. Question
16. When temperature of a liquid increases, its surface tension
CorrectIncorrect 
Question and Solution 17 of 50
17. Question
17. A test tube of radius 1.0cm is loaded to 8.8g. If is placed upright in water, find the depth to which it would sink
CorrectIncorrect 
Question and Solution 18 of 50
18. Question
18. A piece of substance of specific head capacity 450JKg1K1 falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms2]
CorrectIncorrect 
Question and Solution 19 of 50
19. Question
19.
I. A liquid boils when its saturated vapour pressure is equal to the external pressure
II. Dissolved substances in pure water lead to increase in the boiling point.
III. When the external pressure is increased, the boiling point increases.
IV. Dissolved substances in pure water decrease the boiling point.Which combination of the above are peculiarities of the boiling point of a liquid?
CorrectIncorrect 
Question and Solution 20 of 50
20. Question
20.The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions of 20Â°C and 80Â°C respectively is
CorrectIncorrect 
Question and Solution 21 of 50
21. Question
21. Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss;
Specific heat capacity of copper = 400JKg1K1
Latent heat of fusion of ice = 3.3 x 10^5JKg1CorrectIncorrect 
Question and Solution 22 of 50
22. Question
22. The equation of a wave travelling along the positive xdirection is given by;
y = 0.25 x 10^3 sin (500t – 0.025x).
Determine the angular frequency of the wave motion.CorrectIncorrect 
Question and Solution 23 of 50
23. Question
23. The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40hz and 180Hz?
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Question and Solution 24 of 50
24. Question
24. The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine?
CorrectIncorrect 
Question and Solution 25 of 50
25. Question
25. If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is
CorrectIncorrect 
Question and Solution 26 of 50
26. Question
26. A catapult used to hold a stone of mass 500g is extended by 20cm with an applied force F. If the stone leaves with a velocity of 40m/s, the value of F is
CorrectIncorrect 
Question and Solution 27 of 50
27. Question
27.
I. The frictional force is independent of the area of the surfaces in conduct
II. The frictional force depends on the nature of the surfaces in contact
III. The frictional force depends on the speed of sliding
IV. The frictional force is directly proportional to the normal reaction.Which combination of the above is true of sliding friction?
CorrectIncorrect 
Question and Solution 28 of 50
28. Question
28. A thin wire with heavy weights attached to both ends is hung over a block of ice resting on two supports. If the wire cuts through the ice block while the block remains solid behind the wire, the process is called
CorrectIncorrect 
Question and Solution 29 of 50
29. Question
29. A metal of mass 0.5kg is heated to 100Â°C and then transferred to a welllagged calorimeter of heat capacity 80JK1 containing water of heat capacity 420JK1 at 15Â°C. If the final steady temperature of the mixture is 25Â°C, find the specific heat capacity of the metal.
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Question and Solution 30 of 50
30. Question
30. The resultant of two forces acting on an object is maximum if the angle between them is
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Question and Solution 31 of 50
31. Question
31. The efficiency of a machine is always less than 100% because the
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Question and Solution 32 of 50
32. Question
32. Which of the following consists entirely of vector quantities?
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Question and Solution 33 of 50
33. Question
33. The pressure of a given mass of a gas changes from 200Nm2 to 80Nm2 while the temperature drops from 127Â°C to 73Â°C. The ratio of the final volume to the initial volume is
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Question and Solution 34 of 50
34. Question
34. The thermometric substance of an absolute thermometer is
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Question and Solution 35 of 50
35. Question
35. A plane sound wave of frequency 85.5Hz and velocity 342ms1 is reflected from a vertical wall. At what distance from the wall does the wave have antinode?
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Question and Solution 36 of 50
36. Question
36. A gas with initial volume of 2 X 106m3 is allowed to expand to six times its initial value at constant pressure of 2 x 105Nm2. The work done is
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Question and Solution 37 of 50
37. Question
37. The cost of running five 60 W lamps and four 100 W lamps for 20 hours if electrical energy cost #10.00 per kwh is
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Question and Solution 38 of 50
38. Question
38. A copper cube weighs 0.25 N in air, 0.17N when completely immersed in paraffin oil and 0.15 N when completely immersed in water. The ratio of upthrust in oil to upthrust in water is
CorrectIncorrect 
Question and Solution 39 of 50
39. Question
39. A wheel and axle is used to raise a load of 500 N by the application of an effort of 250 N. If the radii of the wheel and the axle are 0.4 cm and 0.1 cm respectively, the efficiency of the machine is
CorrectIncorrect 
Question and Solution 40 of 50
40. Question
40. The hydrostatic blood pressure difference between the head and the feet of a boy standing straight is 1.65 x 104 Nm2. Find the height of the boy.
[ Density of blood = 1.1 x 103 kgm3, g = 10ms2]CorrectIncorrect 
Question and Solution 41 of 50
41. Question
41. A bodyweight 80N stands in an elevator that is about to move. The force exerted by the floor on the body as the elevator moves upward with an acceleration of 5 ms2 is
[g = 10ms2]CorrectIncorrect 
Question and Solution 42 of 50
42. Question
42. Two force each of 10N acts on a body, one towards the north and the other towards the east.
The magnitude and the direction of the resultant force areCorrectIncorrect 
Question and Solution 43 of 50
43. Question
43. A particle in circular motion performs 30 oscillations in 6 seconds. Its angular velocity is
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Question and Solution 44 of 50
44. Question
44. The effects of a particle in a fluid attaining its terminal velocity is that the
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Question and Solution 45 of 50
45. Question
45. The radiator of a motor car is cooled by
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Question and Solution 46 of 50
46. Question
46. Which of the following is a characteristic of stationary waves?
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Question and Solution 47 of 50
47. Question
47. The property that is propagated in a travelling wave is
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Question and Solution 48 of 50
48. Question
48. The time rate of loss of heat by a body is proportional to the
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Question and Solution 49 of 50
49. Question
49. If tension is maintained on a stretched string of length 0.6m, such that its fundamental frequency of 220Hz is excited, determine the velocity of the transverse wave in the string.
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Question and Solution 50 of 50
50. Question
50. Blowing air over a liquid aids evaporation by
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