0% 0 Physics Quiz 6 1 / 50 At resonance the value of the power factor in an L-C-R series circuit is_______________? Zero Not definite 2 1 2 / 50 The direction of the linear velocity of a body moving in a circle is______________? along the tangent directed towards the centre directed away from the centre along the axis of rotation 3 / 50 Who discovered the inverse square law for gravity ? Newtons Plank Galileo Einstein 4 / 50 A voltage V = V0 cos ?t is applied across a resistor of resistance R the average power dissipated per cycle in the resistor is given by___________? 2/?2?R V02/?2R V/?2?R V?/?2R 5 / 50 What is the angle that the given vector makes with y-axis and A=2i+3j ? 90? 60? 30? 120? 6 / 50 Energy needed to magnetize and demagnetize is represented by _________________? Hysteresis loop area Hysteresis curve Straight line Hysteresis loop 7 / 50 The source of geothermal energy is___________________? residual lost of the earth compression of material in the earth all as said in A ? B and C decay of radioactive element in the earth 8 / 50 In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________? Remains same Becomes half Becomes double First increases then decrease because of the curvilinear graph 9 / 50 According to Newton sound travel in air under the conditions of_____________________? isothermal isobaric isochoric adiabatic 10 / 50 Which quantity is a state function_______________? internal energy heat supply pressure volume 11 / 50 An electron enters a region where the electric field E is perpendicular to the magnetic field It will suffer no deflection if_________________? E = BeV/2 E = BV E = BeV B = eE/V 12 / 50 In double slit experiment if one of the two slit is covered then________________? no fringes observed no diffraction fringes are observed no interference fringes are observed interference pattern not disturbed 13 / 50 If an object is placed away from 2f of a converging lens then the image will be_______________? virtual virtual and erect real and erect real and inverted 14 / 50 If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________? 2.8 ms-1 1.6 rad. S-1 5 rad. S-1 4 rad. S-1 15 / 50 The velocity of sound in air would become double than its velocity at 0?C at temperature ? 819?C 313?C 1172?C 586?C 16 / 50 Sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is______________? Greater than 82 Smaller Same Sometimes smaller some times greater 17 / 50 According to equation of continuity A1V1 = A2V2 = constant. The constant is equal to_______________? The density of the fluid Volume of fluid Flow rate Mass of fluid 18 / 50 The metastable state for an atom in laser light is_____________? 10-4 sec 10-8 sec 10-5 sec 10-3 sec 19 / 50 An alpha particle can produce fluorescence in__________________? All of above ZnS Calcium tungstate Barium platinocyanide 20 / 50 With increase in temperature the electrical conductivity of intrinsic semi conductor___________________? Increases Remains same Decreases First increases then decreases 21 / 50 In p-n-p transistor the collector current is________________? any of above slightly less than emitter current greater than emitter current equal to emitter current 22 / 50 Which one is not an example of adiabatic process ? rapid expansion of air conversion of water into ice in refrigerator rapid escape of air from a burst tyre cloud formation in the atmosphere 23 / 50 Stokes law is applicable if body has __________shape? Spherical Square Circular Rough 24 / 50 If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is________________? At any point during motion At the highest point At the lowest point At the point where gravity is not acting 25 / 50 Specific resistance of a wire____________________? will depend on its radius will depend on none of the above will depend on its length will depend on the type of material of the wire 26 / 50 Two parallel wires carrying currents in the opposite directions____________________? attract each other repel each other have no effect upon each other they cancel out their individual magnetic fields 27 / 50 A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire ? 1.0J 0.04J 0.01J 0.02J 28 / 50 A changing magnetic flux produces around itself an induced_______________? Electric field Artificial gravitational field Electromagnetic force Magnetic field 29 / 50 The natural frequency of simple pendulum depends upon_______________? It?s mass It?s length Square of its length The square root of its length 30 / 50 Geostationary satellite completes one rotation around the earth in_______________? 3 hours 12 hours 24 hours 6 hours 31 / 50 At Murree Hills (Assume the value of g changes). If we use a simple pendulum as time standard then one-second duration will_____________? Remains the same Decrease Increase Is zero 32 / 50 Which one is the correct representation of the unit of pressure ? newton/Meter2 Newton/meter2 newton/meter2 Newton/Meter2 33 / 50 Which one of the following bulbs has the least resistance ? 100 watt 300 watt 200 watt 60 watt 34 / 50 The pressure exerted by a column of mercury 76cm high and at 0?C is called_______________? 1 Newton per square meter 1 atmosphere data is insufficient 1 Pascal 35 / 50 Newton?s Third Law of Motion? every action there is an equal and opposite reaction. temperature remaining constant, volume of a given mass of a gas varies inversely attraction or repulsion between two charges volume of a given mass of gas increases or decreases 36 / 50 The most useful tracer is_________________? I-131 Sr-90 C-14 CA-41 37 / 50 For ___________ flow the path of the fluid particles cannot be tracked? Laminar Streamline Turbulent Both A and B 38 / 50 The formula of inter-conversion of centigrade and Fahrenheit scale is___________? f -32/9 =c/5 c-32/9 none f-32/9=c/9 39 / 50 The time period of a second pendulum is______________? 2 seconds 6 seconds 3 seconds 4 seconds 40 / 50 Oil rises up to wick in a lamp because_____________? Oil is volatile Diffusion of oil through the wick Oil is very light Capillary action phenomenon 41 / 50 Gravitation force of moon is_________? 1.62 m/s? 3.75 m/s? 9.8 m/s? 7.2 m/s? 42 / 50 When the amplitude of a wave becomes double its energy become_________________? One half None time Four times Double 43 / 50 What is the value of the current in a wire of 10cm long at the right angle to a uniform magnetic field of 0.5 Weber/m2 when the force acting on the wire is 5N ? 10A 1A 100A 1000A 44 / 50 The operational amplifier is______________? A high resistance amplifier A low resistance amplifier A high gain amplifier A high-power amplifier 45 / 50 A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency ? frequency lower than 20 Hz 1/4f 2f 1/2f 46 / 50 The normal blood pressure range for a human body is______________? 60 to 140 torr 120 to 60 torr 120 to 80 torr 100 to 80 torr 47 / 50 The function of collimeter in spectrometer is________________? to produce parallel beams of light to make them to filter the light rays no function 48 / 50 The symbol of the prefix used for Mega is_______? M G h E 49 / 50 A body can have constant velocity when it follows a_____________? Elliptical path Parabolic path Rectilinear path Circular path 50 / 50 Gravitational P.E of a body has____________________? a formula mgh only no general formula no formula a formula 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 5 Physics Quiz 7Next
