Question 1A stone is thrown vertically upwards and returns to the thrower after 6s. Calculate the maximum height attained. [g = 10m-2]A.45mB.90mC.135mD.180mObjective Show full explanation
Question 2If a particle of constant mass moves in the direction of a uniform gravitational force field, its acceleration willA.IncreaseB.decreaseC.be uniformD.be constant.Objective Show full explanation
Question 3The area under a force distance curve of a mechanical system is a measure ofA.Mechanical advantageB.distance coveredC.work doneD.power dissipatedObjective Show full explanation
Question 4How long will it take an electric heater to raise the energy of a body by 331000J then it is connected to the main power source of 14.5A, 220V?A.15.76sB.103.76sC.235.76sD.3300.76sObjective Show full explanation
Question 5A good method of reducing friction between two moving objects is byA.Smoothening their surfacesB.heating their surfacesC.reducing their area of contactD.increasing their area of contactObjective Show full explanation
Question 6A technician applied 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 nutA.1000.0NmB.625.0NmC.62.5NmD.10.0NmObjective Show full explanation
Question 7An addition load to an elastic wire when the elastic limit is already reached will make the wire toA.BreakB.be strained permanentlyC.recoilD.vibrate at high amplitudeObjective Show full explanation
Question 8An aneroid barometer can also be used asA.A multimeterB.a hypsometerC.an altimeterD.a hydrometerObjective Show full explanation
Question 9The variation in the thermometric property of an optical pyrometer depends on theA.Radiant heatB.volume of the trapped gasC.volume of the thermometric liquidD.pressure of the trapped gasObjective Show full explanation
Question 10An iron 2cm thick has a cross sectional area of 0.5cm2 with temperatures of 15°C on both sides. Calculate the amount of heat that passes through the plate each second. [Thermal conductivity of iron = 59Wm-1K-1]A.18.4WB.36.9WC.184.4WD.368.8WObjective Show full explanation
Question 11The volume of a fixed mass of gas is 600cm3 at 27°C. Calculate its temperature when the volume is changed to 300cm3 at the same pressureA.-273°CB.-123°CC.13.5°CD.54.0°CObjective Show full explanation
Question 12The average distance a molecule travels between successive collisions is theA.Free pathB.mean free pathC.path traversedD.total distanceObjective Show full explanation
Question 13Which section of electromagnetic spectrum is emitted as thermal radiation?A.Gamma rayB.infra-redC.ultra violetD.visible lightObjective Show full explanation
Question 14A section through an advancing wave in which all the particles are in the phase is theA.Wave amplitudeB.wave troughC.wave crestD.wave frontObjective Show full explanation
Question 15A wave is represented by the equation y = A sin pi⁄6 (vt + x), where A is in meters. Calculate the wavelengthA.0.33mB.3.00mC.6.00mD.12.00mObjective Show full explanation
Question 16The occurrence of echo is a result ofA.Absorption of sound wavesB.retraction of sound wavesC.reflection of sound wavesD.reverberation of sound wavesObjective Show full explanation
Question 17When a musical instrument is sounded, the overtones emanating from itA.Are independent of the type of instrumentB.always include all its harmonicsC.do not affect the quality of the soundD.may have some of its harmonicsObjective Show full explanation
Question 18A major property of light waves is that isA.Propagated in a curved lineB.electromagnetic in natureC.in the form of longitudinal wavesD.electrostatic in natureObjective Show full explanation
Question 19A boy stands between two paired plane mirrors. How many images of the boy can be formed in the mirrors?A.TwoB.fourC.eightD.infinityObjective Show full explanation
Question 20A converging lens of focal length 20cm produces an erect image of magnification 2. Calculate the object distanceA.30.0cmB.22.0cmC.10.0cmD.0.1cmObjective Show full explanation