1. Which activity is not base upon friction ?
a) writing b) speaking c) hearing d) walking
2. The maximum time period of any simple pendulam on the earth is :
a) 180.5 min b) 100 min c) 90.5 min d) 84.5 min
3. Which is the most elastic ?
a) Iron b) Copper c) Quartz d) Wood
4. Ratio between maximum range and square of time of flight in projectile motion is :
a) 10 : 49 b) 49 : 10 c) 98 : 10 d) 10 : 98
5. Capactors are used in electrical circuits where appliances need more :
a) Current b) Voltage c) watt d) Resistance
6. If the circumference of a sphere is 2m , then capacitance of sphere in water would be :
a) 2700 pF b) 2760 pF c ) 2780 pF d) 2800 pF
7. If we consider solar system consisting of the earth and sun only as of the ideal thermodynamic system . The sun works as source of energy having temperature 6000 K and earth as sink having temperature 300 K , the efficiency of solar system would be on the basis of exchange of radiations
a) 30 % b) 65 % c) 75 % d) 95%
8. a motor cycle racer takes a round with speed 20 m/ s in a curvature of radius of R = 40 m,
then the leaning angle of motor cycle for safe turn is ( g = 10 m / s2 second square ) :
a) 20*(twenty degree ) b) 30* c) 45* d) 60*
9. Photoelectric effect is an example of :
a) elastic collision b) inelastic collision c) two dimensional collision d) oblique collision
10. An electric pump is used to fill an overhead tank of capacity 9 m3 (meter cube) kept at a
height of 10 m above the ground. If the pump takes 5 min to fill the tank by consuming 10 kW
power the efficiency of the pump should be :
a) 60 % b) 40 % c) 20 % d) 30 %
11. the molar heat capacity in a process of a diatomic gas ,if it does a work of Q / 4 when a heat of
Q is supplied to it :
a) 2R / 5 b) 5R / 2 c) 10R / 3 d) 6R / 7
12. For different capillaries of radius r , the condition of liquid rise ( h) to surface tension is :
a) rh = constant b) h / r = constant c) h + r = constant d) h -- r = constant
13. The ratio between Bohr radii are :
a) 1 : 2 : 3 b) 2 : 4 : 6 c) 1 : 4 : 9 d) 1 : 3 : 5
14. If the half life of a radio isotope is 2 s and number of atoms are only 4 , then after one half life
remaining ( without decay ) atoms are probably :
a) 1 b) 2 c) 3 d) all of these
15. h / 2 pi is the dimension of :
a) velocity b) momentum c) energy d) angular momentum
16. Which of the following has high pitch in their sound :
a) Lion b) mosquito c) man d) woman
17. Geostationary satellite
a) falls with g towards the earth b) has period of 24 h c) has equatorial orbit
d) all of the above
18. The potential on the hollow sphere of radius 1 m is 1000 v , then potential at 1 /4 m from the
centre of the sphere is
a) 1000 v b) 500 v c) 250 v d) zero
19. Which unit is not for length ?
a) Parsec b) Light year c) Angstrom d) Nano
20. Which one is angular resolution fundamental quantity ?
a) Length b) Time c) Radian d) Angle
21. For which of the following processes is the entropy change zero ?
a) Isobaric b) Isothermal c) Adiabatic d) None of these
22. Following process is known as
hv ----------- e⁺ + e⁻
a) pair production b) photoelectric effect c) common effect d) Zeeman effect
23. The value of Plank energy is :
a) nhc /λ b) nhλ c) nhcλ d) nhλ / c
24. A radio transmitter radiates 1 kW power at a wavelength 198.6 m . How many photons does it emit
per second
a) 10 ¹⁰ b) 10 ²⁰ c) 10 ³⁰ d) 10 ⁴⁰
25. A sphere of mass 10kg and radius 0.5m rotates about a tangent . The moment of inertia of the sphere is
a) 5 Kg-m² b) 2.7 Kg-m² c) 3.5 Kg-m² d) 4.5 Kg-m²
26. A spring of force constant 800 N/m has an extension of 5 cm . The work done in extending it
from 5 cm to 15 cm is
a) 16 J b) 8 J c) 32 J d) 24 J
27. The temperature at which the speed of sound in air becomes doubled its value at 0*C is
a) 1092*C b) 819*C c) 819*C d) 546*C
28. The ratio of acceleration due to gravity at the bottom of a deep mine and that on the surface of the earth is 978 /980 . Find the depth of the mine if the density of the earth is uniform throughout and the radius of the earth is 6300 km .
a) 12.86 Km b) 13.0 Km c) 25.38 Km d) 90.9 Km
29. A research satellite of mass 200kg circles the earth in an orbit of average radius 3R / 2 where R is the radius of earth. Assuming the gravitational pull on a mass of 1kg on the earth's surface to be 10N , the pull on the satellite will be
a) 880 N b) 889 N c) 885 N d) 892 N
30. The motor of an angle is rotating about its axis an angular velocity of 100 rev/m . It comes to rest in 15 s , after being switched off. Assuming constant angular deceleration . What are the numbers of revolutions made by it before coming to rest ?
a) 12.5 b) 40 c) 32.6 d) 15.6
31. For what value of mₐ will the total power per cycle be maximum in the modulated wave ?
a) zero b) 1 c) 1/ 2 d) › 1
32. For detecting intensity of light we use :
a) photodiode in forward bias b) photodiode in reverse bias c) LED in forward bias
d) LED in reverse bias
a) 1 / 2 b) 1 / 4 c) 1/√2 d) 3 / 4
34. A coil of cross sectional area 400 Cm² having 30 turns is making 1800 rev / min in a magnetic field of 1 T. The peak value of the induced emf is :
a) 0.4 V b) 0.6 V c) 226 V d) 2.26 V
35. Two small magnets each of magnetic moment 10Am² are placed in end on position 0.1 m apart from their centres . The force acting between them is :
a) 0.6 x 10⁷ N b) 0.06 x 10⁷ N c) 0.6 N d) 0.06 N
36. A 10 m long wire of resistance 20 Ὠ is connected in series with a battery of emf 3V and a resistance of 10Ὠ The potential gradient along the wire in V/m is :
a) 0.02 b) 0.1 c) 0.2 d) 1.2
37. If moment of inertia of a disc about an axis tangential and parallel to its surface be i , then what will be the moment of inertia about the axis tangential but perpendicular to the surface ?
a) 6/5 i b) 3/4 i c) 3/2 i d) 5/4 i
38. Given mass of the moon is 1 / 81 of the mass of the earth and corresponding radius is 1 /4 of the earth . If escape velocity on the earth surface is 11.2 km / s , the value of same on the surface of the moon is
a) 0.14 km / s b) 0.5 km / s c) 2.5 km /s d) 5 km /s
39. When a weight of 10kg is suspended from a copper wire of length 3 m and diameter 0.4 mm . Its length increases by 2.4 cm. If the diameter of the wire is doubled, then the extension in its length will be :
a) 7.6 cm b) 4.8 cm c) 1.2 cm d) 0.6 cm
40. A particle is vibrating in a simple harmonic motion with an amplitude of 4cm. At what displacement from the equilibrium position is its energy half potential and half kinetic?
a) 1 cm b) √2 cm c) 3 cm d) 2√2 cm
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