0% 0 Physics Quiz 7 1 / 50 Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________? Beats phenomena All of these Dopplers effect Interference of waves 2 / 50 In which quadrant the two rectangular components of a vector have same sign ? 1st 4th Both 1st and 3rd 2nd 3 / 50 The source of tidal energy is____________________? moon both A and B sun earth 4 / 50 Coefficient of viscosity of honey is greater than______________? Milk Charcoal Water Water 5 / 50 Distance covered by a freely falling body in 2 seconds will be__________________? 44.1 m 4.9 m 39.2 m 19.6 m 6 / 50 Which one of the following cannot be polarized ? sound waves ultraviolot rays radio waves X-rays 7 / 50 A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is _____________________? F=1/Bcos? F=1/B F/0 F=1/Bsin? 8 / 50 In an angular motion, Newton?s second law of motion is_____________? F=?p/It ?? = I ? All above F=ma 9 / 50 In which quadrant, the only value of tan will be positive ? Second First Both 1st and 3rd Third 10 / 50 We can produce heat by________________? Chemical processes Electrical processes All of the above Frictional process 11 / 50 The collision between two bodies be elastic if bodies are_________________? soft and elastic hard and elastic solid and hard solid and soft 12 / 50 X-rays are diffracted by a crystal but not by a diffraction grating because_____________? The penetration power of X-rays is high in a diffraction grating The lines in a diffraction grating cannot reflect X-rays. The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal The ions in a crystal are well arranged 13 / 50 Which one is not a type of dynamic equilibrium ? Static equilibrium Rotational equilibrium Translational equilibrium Both A and C are corret answer 14 / 50 Electromagnetic waves travel in free space with the speed of___________________? Positive rays ?-rays Cathode rays More than sound waves 15 / 50 The thrust on the rocket in the absence of gravitational force of attraction is__________________? constant if the rate of ejected gases is constant Constant not constant constant for short range rocket. 16 / 50 When two bodies move toward each other with constant speeds the distance between them decreases at the rate of 6m / sec. If they move in the same direction the distance between them increases at the rate of 4m/sec. Then their speeds are________________? 5m/s, 1m/s 4m/s, 2m/s 3m/s, 3m/s 6m/s, 1m/s 17 / 50 The dimensions of the coefficient of viscosity are_____________? ML-1T-1 M2L1T1 M2L-1T-1 ML1T-1 18 / 50 To obtain an n-type semiconductor germanium crystal it must be doped with foreign atoms whose valency is_____________? 3 4 5 2 19 / 50 One AMU is equal to__________________? 166 x 10-20g 1.66 x 10-27kg 166 x 10-15ng All of above 20 / 50 A body is moving with uniform velocity. Its______________________? direction of motion changes acceleration changes displacement from origin changes speed changes 21 / 50 If the density of atoms remain same along any direction in a crystal is called__________________? Isotropy Homogeneity Cleavage Symmetry 22 / 50 Boltzman constant K in terms of universal gas constant R and Avagadros number Na is give as_______________? K = nRNa K = RNa K = Na/Ra K = R/Na 23 / 50 The density of human blood is nearly equal to____________? Honey Mercury Oil (kerosene) Water 24 / 50 A 10? electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ? 220/ 2V 220V 110V 220 ?2V 25 / 50 Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their_____________? pressure volume absolute temperature time 26 / 50 Addition of vector obeys_____________? All given laws in A, B and C Associative law Commutative law Distributive law 27 / 50 A 100?F capacitor with a 12V source in series having frequency 50Hz will offer a capacitive reactance of about______________? 32? 62? 100? 50? 28 / 50 Which one of the following physical quantities does not have the dimensions of force per unit area ? Pressure Stress Strain Youngs modulus 29 / 50 Farad is the unit of___________? capacitance None of these inductance voltage 30 / 50 The speed of light will be minimum while passing through ? Air Glass Water Vaccum 31 / 50 For what displacement the P.E becomes 1/4 of its maximum value ? x = x?/4 x = x(2)?/2 x = x? x = x?/2 32 / 50 The flow of ideal fluid is always_______________? Straight line Streamline Irregular Turbulent 33 / 50 Quality of X-rays depends upon ____________ A-filament current B-accelerating voltage C-material of the target ? A & B B & C A & C A B & C 34 / 50 Which of the following branch of Physics deals with the internal structure of earth? Geophysics Atomic physics Plasma physics Biophysics 35 / 50 What are the dimensions of stress ? MLT-2 ML-1T-2 ML-2T-1 ML-T-1 36 / 50 The branch of physics which deals with the living things is called_________? elementary physics cell systems physical sciences biological sciences 37 / 50 The force responsible for the vibratory motion of the simple pendulum is_________________? mg sin? mg ton? mg mg cos? 38 / 50 For a simple pendulu,m the restoring force is caused by________________? Spring Hand Gravity All of these 39 / 50 Resistance of a wire on increasing its temperature will_________________? depends upon altitude of experimentation decrease with rise in temperature will remain same increase with rise in temperature 40 / 50 A completely filled band is called__________________? Forbidden band Core band Valence band Conduction band 41 / 50 In liquids and gases the current is due to the motion________________? both negative and positive charges negative charges positive charges neutral particles 42 / 50 When two identical traveling waves are superimposed, the velocity of the resultant wave__________________? increases becomes zero decreases remains unchanged 43 / 50 Thermions are________________? positrons electrons protons photons 44 / 50 In the capacitive circuit the current___________________? Opposite in phase of voltage by ? Leads forward the voltage by ?/2 Lags behind voltage by ?/2 Is in phase with voltage 45 / 50 Errors in the transmission of power through optic fiber can be minimized by using a______________? Copper wire Single mode step index fiber Graded index fiber Multimode index fiber 46 / 50 When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ? 5000 nm 2000um 500m 5000A 47 / 50 In the shadow of a ball the central portion appears bright that happens due to_________________? Polarization Diffraction Interference Refraction 48 / 50 One kilowatt hour is the amount of energy delivered during _______________? one hour one minute one second one day 49 / 50 Unit of G is ______________? Nm2Kg None Nm2Kg2 Nm2Kg-2 50 / 50 X-rays are similar in nature to_______________? Cathode rays Positive rays Beta rays ?-rays 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 6 Physics Quiz 8Next
