0% 0 Physics Quiz 5 1 / 50 An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a ______________? Virtual input Output Reference voltage on the other Non-inverting voltage at output 2 / 50 A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe _____________________? always an node in formed always an antinode is formed neither node nor antinode is formed sometimes a node and sometimes an antinode is formed 3 / 50 In double slit experiment we observe _____________________? both interference and diffraction fringes interference fringes only diffraction fringes only polirized frringes 4 / 50 Why should a resistance be introduced in a circuit in series deliberately ? to increase current to decrease current to control current just to give a good look to circuit 5 / 50 Steradian is the SI unit of________________? Solid angle Neither plane angle nor solid angle Plane angle Both plane angle and solid angle 6 / 50 The profile of aeroplane wing which lifts it up is called as_____________? Curved profile Aerofoil profile Wing shape None of these 7 / 50 Terminal velocity of the body is directly proportional to the_______________? Size of the body Square of the diameter of the body The diameter of the body The radius of the body 8 / 50 A diffraction grating has 500 lines per mm. Its slit spacing or grating element will be equal to ____________________? 2 x 10-5 mm 5 x 10-3 mm 2 x 10-3 mm 500 mm 9 / 50 Reflecting mirrors in laser is used to______________? All Further stimulation For producing more energetic lasers Lasing more 10 / 50 The charge on an electron was determine by ________________? Millikan Ampere Thomson Maxwell 11 / 50 The__________branch of Physics deals with nuclear particles such as neutrons, protons and nuclear? structure is called Plasma Physics Nuclear Physics Solid State Physics 12 / 50 Which one of following band is completely filled in case of conductors ? Forbidden band Conduction band Valence band Fermi band 13 / 50 A lens which converges a beam of parallel rays to a point is called______________? plano concave lens plano convex lens converging (or convex) lens diverging (or concave) lens 14 / 50 The distance between any two consecutive crests or troughs is called____________________? frequency phase difference Wave length period 15 / 50 Which equation is not dimensionally correct ? S=1/2at2 E=mc2 S=Vt2 Vf=Vi+at 16 / 50 Stopping potential for a metal surface in case of photoelectric emission depends on_____________? the intensity of incident light the threshold frequency for the metal surface all of the above the frequency of incident light and work function of the metal surface 17 / 50 The length of the second pendulum is_________________? 99 cm 99.2 cm 98 cm 100 cm 18 / 50 Which one is not correct for a vector A= 2i+2j+3k ? Has direction 45? with an x-axis Has magnitude 2 and direction ?=45? with a y-axis Has magnitude 2 Has magnitude -2 19 / 50 The dimension of force is____________________? MLT-2 ML2T2 ML-2T-2 ML2T-2 20 / 50 The velocity of laser light is___________________? Less than ordinary light More than ordinary light Different for different colours or frequency Equal to ordinary light 21 / 50 Two identical coaxial circular loops carry equal currents in the same direction. If the loops approach each other the current in______________? Each remains the same Each increase Each decrease One increases whereas that in the other decreases 22 / 50 Which one is the dimensionally correct equation ? S=Vit+1/2at2 f=vt V=f/t V=St 23 / 50 Bernoulli?s equation is applicable for_________________? None of these Laminar flow Both laminar and turbulent flow Turbulent flow 24 / 50 When A.C current passes through a capacitor then the current relationship will be_______________? The voltage leads current by phase angle is 45 degrees The current lead voltage by phase angle is 45 degrees The voltage leads current by phase angle is 90 degrees The current lead voltage by phase angle is 90 degrees 25 / 50 The SI unit of force constant is identical with that of__________________? Pressure Force Loudness Surface tension 26 / 50 A particle having the mass of an electron and the charge of a proton is called a______________? Positron Antiproton Gamma rays Photon 27 / 50 Joule Thomson effect is based upon __________ ? Heating of gases Sudden expansion of gases Cooling of gases Sudden compression of gases 28 / 50 The uncertainty in momentum & position is due to its_____________? Very high velocity Emission of the certain wavelength Property of matter and radiation Two-dimensional motion 29 / 50 Flight of a rocket in the space is an example of______________________? third law of motion first law of motion law of gravitation second law of motion 30 / 50 The relation between the escape velocity V esc and orbital speed Vo is given by________________? V esc = -2 Vo V esc = 1/2Vo V esc = 2Vo V esc = Vo 31 / 50 In normal state of energy the incident high energy photons will be______________? Absorbed Stimulated Cause laser production Cause X-ray emission 32 / 50 If a body of mass 10 kg is allowed to fall freely, its weight becomes______________? 0 10N 9.8 N 89N 33 / 50 It is easier to turn a steering wheel with both hands than with a single hand because______________? The couple acts on the wheel Two hands provide a firm grip Accelerating force increases on the wheel Two forces act on the wheel 34 / 50 Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________? focus 2 f f/2 zero 35 / 50 The tides raise the mater in the see roughly in a day___________________? once eight time twice four time 36 / 50 There are three bulbs of 60W 100W and 200W which bulb has thickest filament ? 100W all 200W 60W 37 / 50 A transmitting station emits radio waves of wavelength ? at power P. If h is Planck?s constant & c the speed of light what is the rate of emission of photons ? h ? Speed of sound Speed of lightB. 38 / 50 The efficiency of the Carnot engine working between 150?C and 50?C is__________? 100% 23.60% 50% 29.40% 39 / 50 The most suitable unit for expressing nuclear radius is_______? Angstrom Nano meter Micro Fermi 40 / 50 Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is__________________? 0.5 1 0.2 2 41 / 50 How many main frontiers of fundamental science ? 3 1 2 4 42 / 50 When two protons are brought together_____________________? None Kinetic energy increases P. D. P. P.E. between them increases 43 / 50 Which one is the derived quantity in SI units _____________? Plane angle Amount of substance Electric current Electric charge 44 / 50 A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference ? man does more work than child it is a foolish question both do the same amount of work child does more work than man 45 / 50 Increase in velocity of sound in the air for 1?C rise in temperature is_________________? 2.00 ms-1 61.0 ms-1 0.61 ms-1 1.61 ms-1 46 / 50 The size of one degree of Celsius is equal to_________________? 1.8 degrees of Fahrenheit scale 2.12 degrees of Fahrenheit scale 3.2 degrees of Fahrenheit scale One degree of Fahrenheit scale 47 / 50 If capacitance of L-C circuit is made four times then frequency of the circuit becomes___________________? One half Twice None Four times 48 / 50 The charge on beta particle is________________? -2 2 -1 1 49 / 50 A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is_______________? mg mg ? ma mg + ma mg ? ma 50 / 50 The electrons in conduction band are free to___________________? Transport vibrations Transport signals Transport impulses Transport charge Provide Your Information Your score is The average score is 0% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevPhysics Quiz 4 Physics Quiz 6Next
