08/05/2020 Senior Class IGCSE Mock Exams(Physics) 0Comments by Gate Academy Please, fill out the information below to continue. NAME EMAIL PHONE NUMBER 1. Which of the following is in a neutral equilibrium?a heavy based table lampthe beam of a balance in usea cone resting on its slant edgea heavy weight suspended on a string2. Radio waves belong to the class of waves whose velocity is about34 m/s3 × 10^-8 m/s3 × 10^6 m/s3 × 10^8 m/s3. Which of the following could be effectively used to reduce friction?greasepetrolkerosenewater4. Fire in the diesel engine is produced by which of the following?Spark plugSelf starterCompressionFriction 5. As a result of air at the top of a barometer, the height of the mercury column is 73.5cm when it should be 75cm, the volume of the space above the mercury is 8cm³. Calculate the correct barometric height when the barometer reads 74cm and the volume of the space above the mercury is 6cm.72cm75.1cm74.5cm76cm6. Two cars moving in the same direction have speeds of 100km/h and 130km/h. What is the velocity of the faster car as measured by an observer in a slower car?200km/h230km/h100km/h130km/h30km/h7. The sources of X-rays and gamma rays, respectively, are The atomic nucleus and electron clouds.Both the atomic nucleusElectron clouds and the atomic nucleus.Both electron clouds.8. A body was slightly displaced from its equilibrium position. Which one of the following is a condition for its stable equilibriuman increase in the potential energy of the bodya decrease in the potential energy of the bodyan increase in the weight of the bodyan increase in the kinetic energy of the body9. An object is acted upon by a system of parallel forces. The condition(s) for a static equilibrium of the object is/are that the....I. algebraic sum of all the moments of the forces about a point is zero.II. parallel forces must be equal in magnitude and direction.III. resultant of the parallel forces is zero.I & III onlyII & III onlyII onlyIII onlyI only10. The unit of electric current, the ampere, is dimensionally equivalent to which one of the following?volt∙wattvolt^2∙ohmwatt/voltvolt /ampere11. A rectangular tank contains water to the depth of 2m. If the base is 4m x 3m, calculate the force on the base ( density of water = 1000kg/m³, g = 10m/s²)1,700N240,000N24,000N20,000N12. The motion of a moving skin of a talking drum can rightly be described asRandomTransitoryOscillatoryRotationalTranslational13. What keeps an electron in orbit around the nucleus?More electrons than protonsElectrostatic force and electrons spinningElectrostatice force and protons spinningLess protons than electrons14. The ratio of primary and secondary turns in a transformer is 1: 200. If 220-volt a.c. is fed to primary, the voltage across secondary will be 220/200 V40 k V44 V220 V15. A train has an initial velocity of 44m/s and an acceleration of -4m/s². Its velocity after 10 seconds is8m/s12m/s4m/s2m/s16m/s16. The terminal velocity of a ball-bearing falling through a viscous fluid is reached when theupthrust is equal to the weight of the ballball accelerates uniformlyupthrust is equal to the velocity of the ballvelocity is uniform17. Field lines start on positive charges and end on negative charges. TrueFalse18. In a series circuit the _______________ is always the same PowerVoltageResistanceCurrent19. When a paint brush is removed from clean water, the bristles of the brush are pulled together because ofthe viscousity of the surroundinglow density of waterthe weight of the brush bristlessurface tensionthe mass of the brush bristles20. When there is an EMF, the direction of the current will always be such that (the magnetic field caused by it) will try to oppose the change producing it. Whose law is this?Boltzmann's LawLenz's LawMaxwell's LawFaraday's Law21. Suppose six resistors are hooked up in series, and each of them has a value of 540 Ω. Then the total resistance is90 Ω540 Ω3.24 KΩnone of the above22. Do atoms have a charge? MaybeNoYesSometimes23. If charge stored on plates of capacitors is large, then capacitance will beinfinitesmallzerolarge24. The self−inductance of a straight conductor is InfinityVery largeVery smallZero25. A constant force of magnitude F, acts on an object of mass 0.4kg initially at rest at a point O. If the speed of the object when it has moved 50m from O is 500m/s, what is the value of F?100N250N0.04N1000N26. A balloon of volume 100m³ and mass 2kg is filled with helium of density 0.18kg/m³ at ground level. The surrounding air has a density of 1.28kg/m³. Calculate the maximum mass which the balloon can lift off the ground.85kg120kg108kg128kg27. Oil from a bottle flows out more easily after it has been warmed becausefriction between the oil layer is reducedmolecules are given potential energy during warmingosmotic pressure of the oil is increasedoil molecules force one another outcohesion between the oil molecules and those of the bottle is reduced28. A variable resistor is connected across a constant voltage source. Which of the graphs represents the power P dissipated by the resistor as a function if its resistance R?CAEBD29. A boy pulls a nail from the wall with a string tied to the nail. The string is inclined at an angle of 60° to the wall. If the tension in the string is 4N, what is the effective force used in pulling the nail?2√3N4√3N4N2N8N30. Tireni stands on a spring scale placed in a lift. The lift descends at constant velocity. As a result, the scale reads a weightgreater than the weight of Tireniof zerothe same as the weight of Tireniless than the weight of Tirenigreater than the weight of Tireni by 1kg31. Which of the following is the dimensions of pressure? I. ML-1T-2 II. ML-3 III. MLT-2 IV. ML2T-3IVIIIIII32. An object of volume 1m³ and mass 2kg is totally immersed in a fluid of density 1kg/m³. Calculate its apparent weight20N1N10N2N33. When an element undergoes nuclear transmutation, the result is a completely different Isotope of the same element.Ion of the same element.Element34. Which of these statements is true?Ammeters are connected in parallel in a circuit.Voltmeters have a very large internal resistance.Ammeters have a very large internal resistance.Voltmeters are connected in series in a circuit35. The magnitude of the resultant of mutually perpendicular forces, F1 and F2 is 13 N. If the magnitude of F1 is 5 N, what is the magnitude of F2?18N8N12N2.6N65N36. If a fluid flows out of a narrow tube at a depth h below the surface, its velocity isgh√2ghρhρg√2gh2gh37. In the United States of America, people often talk about British thermal units per hour (Btu/h) to quantifyheat of fusionpowerspecific heatenergycondensation rates38. The nucleus of an atom has no charge, it is neutral. TrueFalse39. When we talk about steradians, we talk aboutSolid angular measuregravitational accelerationvolumesurface area40. Current normally flows through a diode inOne directionBoth directionsNeither directionUnpredictable ways41. What is the order of magnitude of the gravitational force between you and the person that sits next to you in class?10^-5 N10^-9 N10^-7 N10^-11 N42. Safety-related work practices involve: The use of ground fault circuit interruptersKeeping proper distance from overhead power linesAll of the aboveVerifying power is off before doing repairs43. The ice point and steam points on a thermometer corresponds to X and 80 mm respectively. A temperature of 60 °C corresponds to 52 mm on the thermometer. The value of X is8 mm20 mm4 mm10 mm44. Which among the following is the best conductor of electricity?LeadSilverCopperGold45. A steam turbine at an electric power plant delivers 4500 kW of mechanical power to an electrical generator which converts 95% of this mechanical energy into electrical energy. What is the current delivered by the generator if it delivers at 3600 V?840 A660 A5900 A1190 A46. There is a greater proportion of carbon 14 in Same in eachOld bones.New bones.47. Insulation and vibration testing are part of ..... Break down maintenancePlanned maintenanceCondition monitoring48. The dimensions of surface tension areM/T²M/L/TM/L/T²MT²49. Define Gravitational Potential Energy at point P. Work done in moving 1Kg from the floor to a point PWork done in moving 1Kg from infinity to a point PWork done in moving a test mass from infinity to a point PWork done in moving a test mass from the floor to a point P50. Some organisms produce electric fields.TrueFalse51. The diagram above shows a wooden block just about to slide down an inclined plane whose inclination to the horizontal is Ø. The coefficient of frictional force between the block and the plane isTanØCosØCotØSinØ52. Two objects move toward each other because of gravity. As the objects get closer and closer, the acceleration of each Decreases.Remains constantIncreases.53. The product 2 amperes x 2 volts x 2 seconds is equal to:8 joules8 newtons8 coulombs8 newton amperes54. What is the maximum possible voltage and current through the circuit?0V,0.48A0V,0.24A6.0V,0.24A6.0V,0.48A55. Which among the following order of decreasing wavelengths of electromagnetic waves is correct?I. Radio waves II. Infrared rays III. Visible Light IV. X-Rays IV, III, II, III, I, IV, IIII, III, II, IVI, II, III, IV56. A well 1km deep is filled with a liquid of density 950kg/m³. If the atmospheric pressure is 100000N/m² and g = 10m/s², the pressure at the bottom of the well is9,600,000N/m² 9,400,000N/m² 20000N/m² 950,000N/m² 57. A man standing on a lift that is descending does not feel any weight becausethere is no reaction from the floor of the liftthe inside of the lift is air tightthere is no gravitational pull on the man in the liftthe lift is in vacuum58. Phenomena in which a body attract uncharged body is known aselectrostatic inductioncharge movementmagnetic inductionelectric current59. The pair of physical quantity that are scalar only areImpulse and timeMoment and momentumVolume and areaLength and displacement60. In the diagram, P, Q & R are vectors. Which of the following options gives the correct relationship between the vectors?P = R - QP = Q + RP = Q - RP + Q + R = 061 out of 60Time is Up!