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. A small trolley is set in motion on a horizontal surface by a force of 250N applied by means of a rope inclined at an angle of 20° to the horizontal. What horizontal force may be used instead?235N140N253N150N-250N2. In the circuit below, the voltmeter V draws negligible current and the internal resistance of the batter is 1.0 ohm. The reading of the voltmeter is?10.0 V11.4 V12.0 V10.8 V3. In the above diagram, the block just moves when the spring balance reads 15.0N. What is F?375.0N40.0N0.6N15.0N10.0N4. Burns cause by electrical current flowing through the body tissue and bones are calledShock BurnsArc BurnsElectrical BurnsThermal Contact Burns5. When a body is completely immersed in a liquid, it displaces an amount of the liquid that is equal to the I. volume of the bodyII. weight of the bodyIII. mass of the bodyWhich of the above is/are correct?I & III onlyII onlyI & II onlyI onlyIII only6. EMF meansnone of theseelectromotive forceelectrical motive forceelectronic motive force7. The term torque means...two coplanar forces at right angles to each otherthe resultant of several forces acting on a body in equilibriumthe equilibrant of two concurrent forcesthe moment of a couple about an axistwo equal and opposite forces whose lines of action do not coincide8. A U-tube contains some mercury of R.D 13.6. Kerosene of R.D 0.8 is poured into an arm of the U-tube until the height of the mercury in that arm is reduced by 1.5cm. Calculate the height of kerosene.25.5cm20cm1.5cm13.6cm9. Electro-mechanical breakdown of solid insulating materials occurs due to Mechanical stresses produced by the electrical fieldElectrical stresses produced by the voltage fluctuations.Magnetic bumVibrations10. An object moves 4m eastwards and then 3m southwards. Its displacement from its original position is7m SE1m SE5m SE12m SE11. A mass of 2kg on a surface (μ = 1/2) is connected to a second mass of 4kg over a frictionless pulley as shown in the diagram. If the acceleration due to gravity is 9.8m/s², then the masses willremain stationaryaccelerate at 9.8m/s²accelerate at 19.6m/s²accelerate at 4.9m/s²accelerate at 39.2m/s²12. 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?1000N0.04N100N250N13. In the diagram below, the hanging mass M2 is adjusted until M1 is on the verge of sliding. The co-efficient of static friction between the mass M1 and the table isM1 / M2M1g / M2M2g / M1M2 / M114. The driver in a car of which the total mass is 800kg and which is traveling at 20m/s, suddenly observes a stationary cat in his path 50m ahead.If the car brakes exert a force of 2KN, what will most likely happen?the car will stop 30m after hitting the catthe cat will stop 5m beyond the catthe driver will quickly reverse the carthe car will be able to stop immediately the driver notices the catthe car will stop 20m in front of the cat15. What keeps an electron in orbit around the nucleus?Electrostatic force and electrons spinningLess protons than electronsElectrostatice force and protons spinningMore electrons than protons16. A spiral spring, loaded with a piece of metal, extends by 10.5cm in air. When the metal is fully submerged in water, the spring extends by 6.8cm. Calculate the relative density of the metal. (Assume Hooke's law is obeyed)17.33.8410.53.717. A circuit must have which of the following?Energy source, battery, something to workEnergy source, wire, something to workEnergy source, wire, switchEnergy source, wire, circuit tester18. What will be the mass of the object on moon surface whose mass is 60 kg on earth's surface 60 kg10 N60 N10 kg19. What is current electricity? Continuous flow of electrons in a circuitEnergy stored within an item, that it then releasedA charge that is built up then dispersed20. The origin of cosmic rays is the Cosmos.Earth.Clouds.Sun.21. The thickness of the central portion of a thin converging lens can be determined very accurately by using?Vernier calliperA microscopeA micrometer screw gaugeA telescope22. Two point charges attract each other with an electric force of magnitude F. If one charge is reduced to one third its original value and the distance between the charges is doubled, what is the resulting magnitude of the electric force between them?3F/23F/4F/6F/1223. The basic measurement of resistance isAmpWattOhmVolt24. Additional earthing can be connected local to work: For extra confidence and operator safetyFor the protection of the equipment from experiencing any accidently appliedIt is a mandatory requirement25. In the figure below, the three forces F1 , F2 & F3 acting at O are in equilibrium. If the magnitude of F1 is 10.0N and the magnitude of F2 is 5.0N; find the magnitude of F313.2N10.0N26.4N15.0N26. The first step in calculating voltage drops in a series-parallel circuit is to determineThe resisistance of the series resitorsTotal CurrentThe resistance of hte parallel resistorsTotal Voltage27. Which of the following is a set of vectors?mass, weight and densitymass, volume and densityacceleration, moment and velocityforce, mass and moment28. Which of the following physical quantities is not a vector?workelectric field intensityforcevelocitymagnetic induction29. A car traveling at 20m/s is brought to rest with a constant deceleration of 10m/s².Calculate the distance traveled.400m200m20m10m30. A boat is towed with a net force of 16000N acting at an angle of 60º to the water surface. If the boat moves with an acceleration of 20m/s², calculate its mass.533.3kg400kg692.8kg133.3kg31. Chlorine has two naturally occurring isotopes, Cl-35 with a relative abundance of 75.77% and Cl-37 with a relative abundance of 24.23%. Work out the average atomic mass of chlorine rounded to the nearest 1/100th of an amu.1235.4832.031732. A ball is dropped from a height of 20m and rebounds with a velocity which is 3/4 of the velocity with which it hits the ground. What is the time interval between the first and the second bounces?0.5s6.0s3.0s2.0s1.5s33. An example of scalar quantity iselectric chargemomentumweightacceleration due to gravityvelocity34. A motor vehicle is brought to rest from a speed of 15m/s in 20s.Calculate the retardation0.75m/s²5.0m/s²7.5m/s²1.33m/s²35. A technician applied a force of 250N at the end of a spanner of length 0.25m in order to loosen a nut. Determine the moment applied to the nut.1000Nm10Nm62.5Nm625Nm36. If a plastic sphere floats in liquid (density = 1000kg/m³) with 0.5 of its volume submerged and floats in oil with 0.4 of its volume submerged, the density of the oil is1200kg/m³2000kg/m³800kg/m³1250kg/m³37. What is the symbol of a bulb?A circle with an xOne big and one small lineA rectangle38. Which of the following statements is/are true?I. detergents poured into water increases its surface tension.II. oil poured onto water reduces its surface tension.III. surface tension helps to keep the eggs of water insects aloft.II & III onlyI & II onlyI onlyII onlyIII only39. Which of the following readings cannot be determined with a meter rule?2.05cm2.00cm2.50cm2.56cm2.55cm40. More than one thermocouple connected together. The connections may be series, parallel, or both.ThermocoupleApprovedOutletThermopile41. In order for a circuit to work, the path must be __________________. ClosedParalledOpenSeries42. There are three resistors in parallel, with values of 22 Ω, 27Ω, and 33 Ω. A 12-V battery is connected across this combination, as shown in Fig. 4-11. What is the current drawn from the battery by this resistance combination? 1.5 A1.3 A150 mA15 mA43. Where is the value of Gravitational acceleration minimum ? Tropic of cancerAlps - EuropePolesEquator44. If a tube of small radius opened at both ends is placed in a liquid, the liquid willrise above the liquid level if the liquid does not wet the glassremain at the same level irrespective of whether the liquid wets the glass or notfall below the liquid level if the liquid does not wet the glassfall below the liquid level if the liquid wets the glass45. Phenomena in which a charged body attract uncharged body is calledelectric currentcharge movementmagnetic inductionelectrostatic induction46. Consider the three forces acting at O and in equilibrium as shown above. Which of the following equations is/are correct?I. P1Sinꝋ1 = P2Sinꝋ2 II. P3 = P1Cosꝋ1 + P2Cosꝋ2III. P1Cosꝋ1 = P1Cosꝋ2I onlyII onlyIII onlyII & III onlyI & III only47. 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 isCotØSinØTanØCosØ48. Body floats in a fluid when it ________displaces its own density of the fluiddisplaces its own weight of the fluiddisplaces its own volume of the liquid (fluid)is no longer subjected to gravity49. What is the fourth step of the troubleshooting procedure?Calculate and measure valuesCheck the setupAnalyze the circuitCheck the results50. 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 I, III, II, IVIV, III, II, III, I, IV, IIII, II, III, IV51. A body of mass 4kg is on the point of slipping down a plane which is inclined at 30° to the horizontal. What force, parallel to the plane, will just move it up the plane? (g = 10m/s²)40N80N8N5N52. During the same interval, it is observed that a train travels the same distance as does a lorry. The two vehicles therefore have the sameinstantaneous velocityinitial velocityaverage speeduniform velocityaverage velocity53. Which of the following quantities are scalar?I. Electric potentialII. TorqueIII. MomentumIV. Kinetic EnergyI & IIIII & IVI & IVII & III54. A weight watcher who normally weighs 400 N stands on top of a very tall ladder so she is one Earth radius above the Earth's surface. How much would she weigh there?400 N100 N0200 N55. When an element undergoes nuclear transmutation, the result is a completely different ElementIon of the same element.Isotope of the same element.56. You have an unlimited supply of 1-W, 1000-Ω resistors, and you need a 500-Ω resistance rated at 7 W or more. This can be done by assembling Four sets of two 1000-Ω resistors in series, and connecting these four sets in parallelSomething other than any of the aboveFour sets of two 1000-Ω resistors in parallel, and connecting these four sets in seriesA 3 X 3 series-parallel matrix of 1000-Ω resistors57. Mechanical pumps cannotincrease the atmospheric pressuredecrease the pressure in an enclosuremove fluids in a vertical directioncompress gases in a containermove fluids in a horizontal direction58. Can you tell if an object is negatively charged or positively charged with an electroscope?Yes, because you can find out by checking the rim.Yes, because electroscopes behave differently.No, because the electroscope behaves the same waySometimes, if you look closely.59. 1000 identical drops of oil of density 500kg/m³ have a total mass of 0.0005kg. One of the drops form a thin film of area 0.5m² on water. The thickness of the film is.0.0000002m0.000000003m0.00000002m0.000000002m60. A very massive object A and a less massive object B move toward each other under the influence of gravitation. Which force, if either, is greater?The force on BThe force on ABoth forces are the same.61 out of 60Time is Up!