0% 0 Physics Quiz 16 1 / 50 If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________? spherical aberration both spherical and chromatic distortion chromatic aberration 2 / 50 Electrical energy is measured in___________________? kilo watt kilowatt hour horse power watt 3 / 50 In hydrogen spectrum which one of the following series lies in the ultraviolet region ? Pfund series Bracket series Balmer series Lymann series 4 / 50 A digit zero in a measurement__________________? May be significant may not significant Always insignificant sign Always significant Significant only if left to a significant figure 5 / 50 The bulk properties of materials such as their mode of fracture can be related to their____________________? Dislocation Microstructure Cleavage Polymerization 6 / 50 A force applied on a body through the string is called_________? Momentum Tension Weight Torque 7 / 50 Work done by variable force is determine by dividing____________________? force into small interval both force and displacement into small intervals displacement into small interval force into small and displacement into large intervals 8 / 50 In obtaining an X-ray photograph of our hand we use the principle of______________? photo electric effect any of above shadow photograph ionization 9 / 50 The uncertainty in a measurement may occur due to_______________? Limitation of an instrument Natural variation of the object to be measured Inadequate technique All given in A, B and C 10 / 50 An A.C series circuit containing 4? resistance and 3? inductive reactance. The impedance of the circuit is______________? 1? 5? 7? 7? 11 / 50 The fission chain reaction in a nuclear reactor can be controlled by introducing _______________? Platinum rods Cadmium rods Graphite rods Iron rods 12 / 50 The value of resistivity for insulator is of the order of____________? 106 ohm metre 105 ohm metre 108 ohm metre 107 ohm metre 13 / 50 How many days would be in a year if the distance between the earth and the sun were reduced to half of its present value (assuming circular orbit) ? 730 days 329 days 365 days 129 days 14 / 50 Light on passing through a Polaroid is ___________________? plane polarized un-polarized elliptically polarized circularly polarized 15 / 50 Blood vessels are______________? Rigid Not rigid Of glass Of rubber 16 / 50 Electrons_________________? Cannot exist inside the nucleus Can exist both inside and outside the nucleus Do not know Can exist inside the nucleus 17 / 50 Which one of the following radiations possesses maximum velocity ? ?-rays ?-rays ?-rays All of above have the same speed 18 / 50 The velocity of an oscillating charge as it moves to and fro along a wire is always_____________? constant infinite zero changing 19 / 50 The speed of light will be minimum while passing through ? Vaccum Water Air Glass 20 / 50 A particle of mass m charge q and speed V enters a uniform magnetic radius r. The radius r of the circle is_________________? directly proportional to m directly proportional to q independent mass m directly proportional to B 21 / 50 When we excite some atoms by heat collision or electrical discharge they will________________? radiate electromagnetic energy of discrete characteristic wavelength absorb particular wavelengths when white light is incident on them emit either invisible or visible light radiate electromagnetic energy with a continuous distribution of wavelength 22 / 50 A ferromagnet will become fully magnetized at_________________? High voltage A.C Low voltage A.C Alternating current at its peak value D.C current at peak value 23 / 50 An inductive coil has a resistance of 100?. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45?. What is the inductance of the coil ? 16mH 20mH 10mH 12mH 24 / 50 T.V sets and microwave ovens emit ___________________? ?-rays ?-rays X-rays ?-rays 25 / 50 The current through a metallic conductor is due to the motion of _________________? still under controversy neutrons free electrons protons 26 / 50 Which one of the following is not vector quantity _______? Displacement Force Acceleration Speed 27 / 50 During an encounter with an atom alpha particle knocks out ______________? Neutrons Nothing Electrons Protons 28 / 50 An electromagnetic wave consists of _____________________? Electric and magnetic fields moving parallel to each other Electric field moving with velocity of light Magnetic field moving with velocity of light in space Electric and magnetic fields moving perpendicular to each other 29 / 50 ________________ cells converts solar energy into electrical energy? photovoltaic galvanic non of these rotory 30 / 50 Wave-like characteristic of electron is demonstrated by______________? Diffraction by crystalline solids Production of x-rays. Photoelectric effect Line spectrum of atoms 31 / 50 Rutherford in his atomic model could not explain behavior of ___________ ? Electrons Neutrino Protons Neutrons 32 / 50 The net charge on n-type material is____________________? Positive Both positive and negative Negative Neutral 33 / 50 To reduce the uncertainty in the timing experiment______________? Count number of vibration Conduct at room temperature Highly precise instrument Both a and C 34 / 50 A mass spectrograph (spectrometer) sorts out____________? Ions Isotopes Elements Molecules 35 / 50 The angular speed of seconds hand of a watch in rads-1 is______________? ?/30 ?/180 ? ?/2 36 / 50 The drag force is given by_________________? Stokes law Newtons law Gauss law Pascals law 37 / 50 A vector can be multiplied by a number. The number may be_______________? All A, B and C are correct Negative Dimensional scalar Dimensionless 38 / 50 A cup of milk is placed in a microwave oven. Tell which statements is false. (1) Milk will be heated up only. (2) Cup will remain cool. (3) Both cup and mild will get hot ? 1 2 3 None 39 / 50 Velocity of fluid increases where the pressure is________________? Changes continuously Constant Low High 40 / 50 The beats frequency (sensible) for a human car is _____________________? 262Hz 256Hz 42Hz 7 Hz 41 / 50 On loading the prong of a tuning form with wax its frequency____________________? decreases increases may increase or decrease remains unchanged 42 / 50 Dimensional analysis is helpful for__________________? Checking the homogeneity of a physical equation Verification of laws Deriving a possible formula Only A and B are correct 43 / 50 A man is in a car is moving with velocity of 36km/hr. His speed with repect to the car is ____________________? 36m/s infinite 10m/s zero 44 / 50 Boyles law helds for ideal gases in________________? isochoric processes isobaric processes adiabatic processes isothermal processes 45 / 50 Area under velocity time graph represent_____________________? distance displacement acceleration force 46 / 50 Pair production takes place in the vicinity of a heavy nucleus so that_____________? Net energy is conserved Net momentum is conserved Net charge is conserved All of the above 47 / 50 Which one of the following is not a radioactive element ? Radium Thorium Uranium Cadmium 48 / 50 The sensitivity of a galvanometer is given by__________________? CAN/B C/BAN ABC/N BAN/C 49 / 50 Radioactive decay obeys which one of the following law ? N=Noe?t N=Noe-?t/2 N=Noe-?t No=N(1+e?t) 50 / 50 At constant temperature the graph between V and 1/P is_____________? Parabola A curve of any shape A straight lime Hyperbola 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 15
