0% 0 Physics Quiz 3 1 / 50 Acceptor and donor impurities donate______________? p-carriers only p-carriers and n-carriers respectively n-carriers and p-carriers respectively n-carriers only 2 / 50 The co efficient of linear expansion is equal to__________? ?L = ?L?T L?T/?L ?L?T-?L ?L/L?T 3 / 50 The alternating voltage is an example of_______________? None at all An analogue waveform A digital waveform Discrete waveform 4 / 50 Magnification of the astronomical telescope is_____________? fo/fe fo+fe (1+fo/fe)L/fo fe/fo 5 / 50 The velocity of light was determined accurately by_______________? Michelson Newton Young Huygen 6 / 50 When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by______________? Mass of a body Centripetal acceleration Velocity of body The tension in the string 7 / 50 Choose the correct statement. In the case of AC circuit ohms law holds for_______________? Peak values of voltage and current Instantaneous values of voltage and current Effective values of voltage and current All of the above 8 / 50 Absolute uncertainty in a measurement depends upon______________? Percentage error in the measurement The magnitude of the measurement All of a, b and C Least count of the instrument 9 / 50 1st law of motion gives the definition of _________________________? rest force motion velocity 10 / 50 On the basis of band theory of solids the semiconductors have _____________________? A partly filled valence band a totally empty conduction band and a wide forbidden band A completely filled valence band a totally empty conduction band and a very wide forbidden band A party filled valence band and totally empty conduction band A completely filled valence band a partially filled conduction band and a narrow forbidden band 11 / 50 In case of planets the necessary acceleration is provided by______________? Coulomb force Gravitational force Frictional force Centripetal force 12 / 50 The bombardment of nitrogen with alpha particles will produce______________? Positron Proton Neutron Electron 13 / 50 Two fog droplets have radius 2:3 their terminal velocities are_______________? 4:06 4:09 4.3 2:09 14 / 50 Alpha particles possess greater penetration power than that of beta particles due to its_____________? Same ionization power Neither greater nor smaller ionization power Smaller ionization power Greater ionization power 15 / 50 The frequency of a circuit consisting of a capacitance C and a resistor R is________________? C/R 1/RC 1/ 2RC R/C 16 / 50 If a body a mass of 2 kg is raised vertically through 2m, then the work done will be _________________? 392.1 J 38.2 J 39.2 J 3.92 J 17 / 50 A chimney works best if air exposed to the chimney is______________? Moving Stationary Moving slowly Moving fast 18 / 50 Antimatter consists of ______________? Antiproton Positron All of above Antineutron 19 / 50 SI unit of flux density is____________________? NA-1m-1 NmA-2 NAm-1 NmA-1 20 / 50 A wire of length L is stretched by a length E when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is_________________? FE2 FE FE2/L (FE) 21 / 50 When a body moves in a straight line then its displacement coincides with__________________? distance acceleration is zero both A and B force 22 / 50 If one or more of the neutrons emitted during fission cab be used to build up further fission then the reaction is self-sustained and is known as __________________? Fission reaction Chain reaction Chemical reaction Fusion reaction 23 / 50 The deflection for 50 division of galvanometer is decreased to 25 divisions by shunt resistance of 12?. Galvanometer resistance is_____________? 12? 18? 30? 24? 24 / 50 Radiation produced from TV picture tube is_____________? B-rays X-rays Infrared Far infrared 25 / 50 The branch of Physics which deals with properties of gravitational? Acoustics Optics Field theory Hydro dynamic 26 / 50 Sound waves do not travel in vacuum because ___________________? they do not have enough energy they are stationary waves they are transverse waves they require material medium for propagation 27 / 50 The escape velocity of a body in gravitational field of earth is independent of__________________? gravitational field of earth its mass both its mass and the angle at which it is thrown the angle at which it is thrown 28 / 50 Work done by the force of friction is____________________? positive only for small frictional force always negative always positive positive only for large frictional force 29 / 50 Which branch of science plays an important role in the development of technology and engineering ? Biology Chemistry Geology Physics 30 / 50 Irregular flow of fluid is called_______________? Turbulent Streamline Uniform Laminar 31 / 50 In vibrating cord the points where the amplitude is maximum, are called ___________________? antinodes nodes troughs crests 32 / 50 If the plane of the rectangular coil is parallel to the magnetic field (i.e radial magnetic field) the torque on the coil is_____________________? ? = NIAB tan? ? = NIAB sin? ? = NIAB cos? ? = NIAB 33 / 50 The frequency of the second pendulum is________________? 1 hertz 0.5 hertz 1.5 hertz 2.5 hertz 34 / 50 How much heat does a 40 W bulb generates in one hour ? 144000J 144J 14J 1.44J 35 / 50 The magnitude of the cross product is equal to the dot product between them. The angle between the two vectors is________________? 30? 180? 60? 45? 36 / 50 In the transistor schematic symbol, the arrow_______________? points form north to south is located on the emitter is locate on the collector is located on the base 37 / 50 A body in equilibrium__________________? Always in uniform motion May be at rest or in motion Always at rest May be at rest or in uniform motion 38 / 50 Laplace found that the alternate compressions and rarefactions produced in sound waves follows ________________? isochoric law all of the above adiabatic law isothermal law 39 / 50 The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________? Ke2/rn ?Ke2/rn Ke2/rn2 ?Ke2/rn2 40 / 50 Concentration of red cells in blood is about______________? 50% 25% 40% 75% 41 / 50 A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be_____________? 2? R 4?R ?R 0 42 / 50 A magnetic field___________________? exerts a force if the charged particle is moving in the direction of the magnetic field lines always exerts a force on a charged particle never exerts a force on a charged particles exerts a force if the charged particle is moving perpendicular to the magnetic field lines 43 / 50 According to Einstein light travels form one place to another in the form of ________________? photons particles it was not his discovery waves 44 / 50 Thermocouples convert___________________? heat energy into electrical energy heat energy into mechanical energy heat energy into light energy mechanical energy into heat energy 45 / 50 SI unit of the coefficient of viscosity is___________________? Kg.m.S-1 Kg m-1.S-1 Kg-1.m-1.S-1 Kg.m.S 46 / 50 Strontium-90 is used as __________________? ?-particle source ?-rays source ?-particle source Neutron source 47 / 50 The cross product i^ x j^ is equal to_______________? i^ Zero k^ One 48 / 50 Unit of power of a lens is________________? watt meter diopter horsepower 49 / 50 The diameter of a lens is called________________? focal length principal axis radius of curvature aperture 50 / 50 The restoring force acting on the simple pendulum is given by_______________? mg sin ? mg cos ? mg sin ? mg cos ? 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 2 Physics Quiz 4Next
