CENTURION UNIVERSITY OF TECHNOLOGY & MANAGEMENT,ODISHA CUEE-015 PHYSICS 1. The imensional formula of angular momentum is a) ML T - b) MLT - c) MLT -1 ) ML T -1. If A B = B A, then the angle between A an B is a) π b) π/3 c) π / ) π /4 3. The time perio of a particle in simple harmonic motion is 8s. At t=0, it is at the mean position. The ratio of the istances travelle by it in the first an secon secons is a) 1 b) 1 c) 1 1 ) 1 3 4. A ball A of mass m moving along positive x-irection with kinetic energy K an momentum P unergoes elastic hea on collision with a stationary ball B of mass M. After collision the ball A moves along negative X-irection with kinetic energy K/9, Final momentum of B is a) P b) P/3 c) 4P/3 ) 4P 5. A ball whose kinetic energy is E, is projecte at an angle of 45 to the horizontal. The kinetic energy of the ball at the highest point of flight will be a) E b) E c) E ) zero 6. When a vibrating tuning fork is place on a soun box of a sonometer, 8 beats per secon are hear when the length of the sonometer wire is kept at 101 cm or 100 cm. Then the frequency of the tuning fork is (consier that the tension in the wire is kept constant) a) 1616 Hz b) 1608 Hz c) 163 Hz ) 1600 Hz 7. A isk of raius 10 cm has a moment of inertia of 0.0 kg.m about its central axis. A force of 15 N is applie tangentially to the periphery of the isk to give it an angular acceleration of magnitue a) 5 ra/s b) 35 ra/s c) 45 ra/s ) 75 ra/s 8. Sum of magnitues of two forces acting at a point is 16N. if their resultant is normal to smaller force, an has a magnitue 8 N, then forces are a) 6N, 10N b) 8N, 8N c) 4N, 1N ) N, 14N 9. A car travelling with a spee of 60 km/h, can brake to stop within a istance of 0 m. If the car is going twice as fast, i.e., 10 km/h, the stopping istance will be a) 0 m b) 40 m c) 60 m ) 80 m
10. If a boy loses half of its velocity on penetrating 3 cm in a wooen block, then how much will it penetrate more before coming to rest? a) 1 cm b) cm c) 3 cm ) 4 cm 11. A particle moves along a straight line with a velocity given by the equation v = t 3 t t + 4where v is the velocity in m/s an t the time in secons. When t = secons, the particle is foun to be at a istance of 10m from a station A. The acceleration of the particle after 6 secons is given by a) 0 m/s b) 1 m/s c) 564.67 m/s ) 404 m/s 1. A spring balance is attache to the ceiling of a lift. A man hangs his bag on the spring an the spring reas 49 N, when the lift is stationary. If the lift moves ownwar with an acceleration of 5 ms -, the reaing of the spring balance will be a) 4 N b) 74 N c) 15 N ) 49 N 13. A particle performing uniform circular motion has an angular momentum L. If its angular frequency is ouble an its kinetic energy halve, then the new angular momentum is a) L/4 b) L c) 4L ) L/ 14. If g is the acceleration ue to gravity at earth s surface an r is the raius of the earth, the escape velocity for the boy to escape out of earth s gravitational fiel a) gr b) gr c) g r ) r g 15. A wire fixe at the upper en stretches by length l by applying a force F. The work one in stretching is a) F l b) Fl c) F l ) 16. Longituinal waves cannot be propagate through a) a gas b) a liqui c) vacuum ) a soli 17. The equation of state of a gas is given by (P + a V 3) (V b ) = ct, where P, V, T are pressure, volume an temperature respectively, an a, b, c are constants. The imensions of a an b are respectively a) ML 8 T an L 3 b) ML 5 T an L c) ML 5 T an L 6 ) ML 6 T an L 3 18. A planet moves aroun the sun in an elliptical orbit with the sun at one of its foci. The physical quantity associate with the motion of the planet that remains constant with time is a) velocity b)centripetal force c) linear momentum ) angular momentum 19. A mass M at rest is broken into two pieces having masses m an (M-m). The two masses are then separate by a istance r. The gravitational force between them will be the maximum when the ratio of the masses [m:(m-m)] of the two parts is a) 1 : 1 b) 1 : c) 1: 3 ) 1 : 4 0. A bullet on penetrating 30 cm into its target loses its velocity by 50%. What aitional istance will it penetrate into the target before it comes to rest? a) 30 cm b) 0 cm c) 10 cm ) 5 cm. 1. Water is flowing through a very narrow tube. The velocity of water below which the flow remains a streamline flow is known as F l
a) Relative velocity b) Terminal velocity c) Critical velocity ) Particle velocity. In a slie callipers, (m + 1) number of vernier ivisions is equal to m number of smallest main scale ivisions. If unit is the magnitue of the smallest main scale ivision, then the magnitue of the vernier constant is a) (m+1) units b) units (m) c) m (m+1) units (m+1) ) units (m) 3. Work one in increasing the size of a soap bubble from a raius of 3 cm to 5 cm is nearly(surface tension of soap solution = 0.03 Nm -1 ) a) 4π mj b) 0.π mj c) π mj ) 0.4π mj. 4. Two spheres of the same material have raii 1 m an 4 m an temperatures 4000K an 000K respectively. The ratio of the energy raiate per secon by the first sphere to that by the secon is a) 1:1 b) 16:1 c) 4:1 ) 1:9 5. First law of thermoynamics is a consequence of the conservation of a) Charge b) heat c) energy ) momentum 6. A vessel contains a mixture of oxygen an hyrogen. The ratio of r.m.s. velocity of hyrogen to that of oxygen is a) 4:1 b) 16:1 c) 1:3 ) 3:1 7. A Carnot engine, having an efficiency of η = 1 as heat engine, is use as a refrigerator. If 10 the work one on the system is 10 J, the amount of energy absorbe from the reservoir at lower temperature is a) 99J b) 90 J c) 1 J ) 100 J 8. At what temperature is the r.m.s. velocity of a hyrogen molecule equal to that of an oxygen molecule at 47? a) 80 K b) -73 K c) 3K ) 0 K 9. Two ros of equal length an area are joine in parallel an their conuctivities are 4.5 an 3.5. What is the conuctivity of the combination? a) 3 b) c) 6 ) 4 30. Four charges equal to Q are place at the four corners of a square an a charge q is at its centre. If the system is in equilibrium, the value of q is a) Q (1 + ) b) Q Q (1 + ) c) (1 + ) ) Q (1 + ) 4 4 31. Which of the following materials is the best conuctor of electricity? a) Platinum b) Gol c) Silicon ) Copper 3. Four capacitors of equal capacitance have an equivalent capacitance C 1 when connecte in series an an equivalent capacitance C when connecte in parallel. The ratio C 1 C is a) ¼ b) 1/16 c) 1/8 ) 1/1 33. Five equal resistance, each of resistance R, are connecte as shown in figure below. A battery of V volt is connecte between A an B. The current flowing in FC will be
a) 3V R b) V R 34. How far apart must two protons be if the electrical repulsive force acting on either one is equal to its weight? (m p=1.66 10-7 kg) a) 0.119 cm b) 1.19 cm c) 11.9 cm ) none of these 35. A current carrying loop is place in a uniform magnetic fiel. The torque acting on it, oes not epen upon c) V R ) V R a) shape of the loop b) area of the loop c) value of current ) magnetic fiel 36. The magnetic fiel ue to current carrying circular loop of raius 3 cm at a point on the axis at a istance of 4 cm from the centre is 54µT. What will be its value at the centre of loop? a) 15µT b) 150µT c) 50µT ) 75µT 37. The current passing through a choke coil of 5H is ecrease at the rate of A/s. The inuce e.m.f. in the coil is a).5 V b) -.5V c) 1.0V ) 10V 38. An ac source is rate at 0V, 50 Hz. The time taken for voltage to change from its peak value to zero is a) 50 sec b) 0.0 sec c) 5 sec ) 5 10-3 sec 39. Frequency of a wave is 6 10 15 Hz. The wave is a) raio wave b) microwave c) X-ray ) ultraviolet 40. Two thin lenses of focal lengths 0 cm an 5 cm are place in contact. The effective power of the combination is a) 9D b) D c) 3D ) 7D 41. In Young s ouble slit experiment the two slits are istance apart. Interference pattern is observe on a screen at a istance D from the slits. A ark fringe is observe on the screen irectly opposite to one of the slits. The wavelength of light is a) D b) D 4. The ionisation energy of hyrogen atom is 13.6 ev. The energy of an electron in the first excite state of hyrogen atom is : a) -3.4 ev b) +3.4 ev c) -6.8 ev ) +6.8 ev 43. The valence ban an conuction ban of a soli overlap at low temperature, the soli may be a) a metal b) a semiconuctor c) an insulator ) none of these 44. A transistor is working in common emitter moe. Its amplification factor β=80. If the base current is 50µA, what is the current at the collector? a) 50µA b) 50 80µA c) 80µA ) 00 80µA 45. In case of frequency moulation a) amplitue changes keeping frequency an phase constant b) frequency changes keeping amplitue an phase constant c) D ) D
c) phase changes keeping amplitue an frequency constant ) amplitue, frequency an phase change 46. The impurity atom with which pure silicon shoul be ope to make a p-type semiconuctor are those of a) phosphorus b) boron c) antimony ) carbon 47. A raio can tune to any station in the 6 MHz to 15 MHz ban. The corresponing wavelength ban is a) 30 m to 55 m b) 5 m to 40 m c) 0 m to 50 m ) 5 m to 50 m 48. The half-life of phosphorus-3 is 15 ays. 10 grams of phosphorus-3 will be reuce to.5 grams in a) 15 ays b) 30 ays c) 60 ays ) none of these 49. The energy of a photon is 3 10-19 joule. Its momentum is a) 10-7 kg m s -1 b) 9 10-11 kg m s -1 c) 10-8 kg m s -1 ) 3 10 17 kg m s -1 50. In the nuclear reaction, 85X 97 Y + 4α, Y is a) 76 Y 87 b) 77 Y 85 c) ) 77 Y 81 ) ) 77 Y 89 Answers: 1 11 a 1 c 31 41 a 1 a a 3 b 4 a 3 c 13 a 3 33 c 43 a 4 c 14 b 4 a 34 c 44 b 5 c 15 5 c 35 a 45 b 6 b 16 c 6 a 36 c 46 b 7 17 a 7 b 37 47 c 8 a 18 8 38 48 b 9 19 a 9 39 49 a 10 a 0 c 30 b 40 a 50 c