Question 0Myopic defects in the human eye can be corrected through the use of aA.Concave MirrorB.Concave lensC.PrismD.Convex lensE.Objective Show full explanation
Question 0A charged particle is moving in a uniform magnetic field. if the direction of motion of the charged particle is parallel to the magnetic field, the path of the charge willA.Be a straight lineB.Curve inwardsC.Be a parabolaD.Curve outwardsE.Objective Show full explanation
Question 0What happens to a water pool on a day when the humidity of the air is very low?A.Temperature decreasesB.Slow evaporationC.Temperature increasesD.Rapid evaporationE.Objective Show full explanation
Question 0A satellite moves in a circular orbit of radius 4R round the earth. The acceleration of the satellite in terms of g isA.\(\frac{g}{16}\)B.\(\frac{g}{4}\)C.\(\frac{4}{g}\)D.\(\frac{16}{g}\)E.Objective Show full explanation
Question 0I.Chemical II.Sound III.Electricity Which of the above forms of energy can directly be converted to light energy?A.I and II onlyB.II and III onlyC.I, II and IIID.I and III onlyE.Objective Show full explanation
Question 0If the distance between the object and the pinhole of a pinhole camera is reduced by half the size of the image of the objectA.Is quadrupledB.Is halvedC.Remains the sameD.Is doubleE.Objective Show full explanation
Question 0An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object and the image isA.80cmB.40cmC.50cmD.70cmE.Objective Show full explanation
Question 0Which of the following statements is correct about a machine?A.Efficiency of a machine is always greater than IB.Efficiency decreases with an increase in frictionC.Velocity ratio depends on frictionD.Mechanical advantage increases with an increase in frictionE.Objective Show full explanation
Question 0The instrument used to view stars is theA.Prism binocularsB.TelescopeC.Film projectorD.MicroscopeE.Objective Show full explanation
Question 0What is the angular magnification of a telescope having objective and eyepiece lenses of a focal lengths 30cm and 3cm respectively?A.60B.10C.30D.90E.Objective Show full explanation
Question 0A wire of length 10m is cooled from 50oC to 10oC. Calculate the decrease in the length of the wire. [c = 3 x 10-5K-1]A.1.8 x 10-4mB.1.5 x 10-4mC.1.5 x 10-3mD.1.8 x 10-3mE.Objective Show full explanation
Question 0When an athlete perspires after running, he loses heat throughA.EvaporationB.ConductionC.RadiationD.ConvectionE.Objective Show full explanation
Question 0The rate of cooling of a heated quantity of liquid in an enclosure depends on theA.Pressure of the liquidB.Temperature in the enclosureC.Pressure of the enclosureD.Volume of the liquidE.Objective Show full explanation
Question 0The heat required to raise a mass of a substance through 1K is known asA.Specific heat capacityB.Specific latent heat of vaporizationC.Capacity latent heat of fusionD.Heat capacityE.Objective Show full explanation
Question 0A boy in a barber's shop sits between two parallel mirrors. The number of images observed by him will beA.InfiniteB.TenC.EightD.FortyE.Objective Show full explanation
Question 0Semiconductor is a class of solid whose conductivity increases with an increase inA.PressureB.TemperatureC.CurrentD.VoltageE.Objective Show full explanation
Question 0Which of the following statements is NOT correct?A.Brownian motion is an evidence of the particle nature of matterB.Atoms combine to form moleculesC.The molecules of matter are in constant motionD.matter is made up of moleculesE.Objective Show full explanation
Question 0A dynamo primarily convertsA.Mechanical energy into electrical energyB.Electrical energy into kinetic energyC.Potential energy into kinetic energyD.Kinetic energy into potential energyE.Objective Show full explanation
Question 0A saturated vapour pressure of a liquid increases when theA.Temperature of a liquid increasesB.Volume of the liquid increasesC.Volume of the liquid decreasesD.Temperature of the liquid decreasesE.Objective Show full explanation
Question 0What force has to be exerted on a mass 60kg to give it an acceleration of 10ms-2 vertically upwards? [g = 10ms-2A.300NB.600NC.1200ND.400NE.Objective Show full explanation
Question 0A metre rule is pivoted at its mid-point with a vertical force of 10N hanging from the distance 30cm from the mid-point. At what distance must a 15N force hang to balance the ruler horizontally?A.30cmB.10cmC.20cmD.25mE.Objective Show full explanation
Question 0A projectile is fired from the ground level with a velocity of 300ms-1 at an angle of a 30o to the horizontal. Calculate the time taken to reach the maximum height? [g = 10ms-2]A.30sB.20sC.25sD.15sE.Objective Show full explanation
Question 0A train with an initial velocity of 20ms-1 is subjected to a uniform deceleration of 2ms-2. The time required to bring the train to a complete halt isA.40sB.10sC.20sD.5sE.Objective Show full explanation
Question 0Which of the following electromagnetic waves has the shortest wavelength?A.Visible LightB.Ultraviolet raysC.Infrared raysD.Gamma raysE.Objective Show full explanation
Question 0A radioactive isotope has a decay constant of 10-6s-1. Calculate its half - life?A.5.93 x 106sB.6.93 x 107sC.6.93 x 109sD.5.93 x 107sE.Objective Show full explanation
Question 0Which of the following waves is both transverse and mechanical?A.Water wavesB.Radio wavesC.Sound wavesD.X-raysE.Objective Show full explanation
Question 0Calculate the temperature of 6 moles of an ideal gas at a pressure of 7.6 x 106Nm-2 with a volume of 10-3m3. [R = 8.3jmol-1K-1]A.201oCB.126oCC.153oCD.185oCE.Objective Show full explanation
Question 0The relative density of a liquid is the ratio of theA.Mass of water to the mass of an equal volume of liquidB.Upthrust in the liquid to the upthrust in waterC.Density of water to the density of the liquidD.Upthrust in water to the upthrust in the liquidE.Objective Show full explanation
Question 0What will happen to the pressure of a gas if its temperature is reduced to -273oC?A.It will decreaseB.it will drop to zeroC.It will increaseD.It will remain constantE.Objective Show full explanation
Question 0Which of the following does Not use magnetic effect of current to function?A.Lead acid accumulatorB.An electric bellC.A moving coil galvanometerD.A telephone receiverE.Objective Show full explanation
Question 0Vapour is said to be saturated on top of an enclosed liquid if _________A.The rate of condensation is greater than that of vapourizationB.The rate of condensation is equal to that of vapourizationC.There is neither condensation nor vaporization of the liquidD.The rate of condensation is less that that of vaporizationE.Objective Show full explanation
Question 0A pool of water appears to be 1.00m deep when viewed vertically from above. What is the actual depth of the pool? [Refractive index of water = 1.33]A.13.300mB.0.750mC.1.013mD.1.330mE.Objective Show full explanation
Question 0Shadows and eclipse result from theA.Reflection of lightB.Rectilinear propagation of lightC.Diffraction of lightD.Refraction of lightE.Objective Show full explanation
Question 0Which of the following is obtained when a magenta is mixed with green colour?A.YellowB.BlueC.WhiteD.RedE.Objective Show full explanation
Question 0Which of the following instruments can be used to measure current in an a.c circuit?A.Hot wire ammeterB.Moving coil ammeterC.Tangent galvanometerD.Moving coil galvanometerE.Objective Show full explanation
Question 0Which of the following statements about wave motion is correct?A.Electromagnetic waves are transverseB.Transverse waves do not require a medium for propagationC.Longitudinal waves vibrate perpendicular to the direction of travelD.All mechanical waves are longitudinalE.Objective Show full explanation
Question 0A satellite revolving around the earth is kept on its orbit byA.Centripetal forces onlyB.Centripetal and frictional forcesC.Centrifugal forces onlyD.Centripetal and centrifugal forcesE.Objective Show full explanation
Question 0A manometer is an instrument used for measuringA.Relative density of liquidB.Pressure in liquids and gasesC.HumidityD.Atmospheric pressureE.Objective Show full explanation
Question 0A body which weighs 50N in air displaces 3.7kg of water when partially immersed in water. Calculate the upthrust on the body?A.8.7NB.37.0NC.87.0ND.13.0NE.Objective Show full explanation
Question 0The impulse of a force is deduced from Newton's second law asA.F = maB.F = m( \(\frac{v - u}{t}\)C.F = mgD.F = mv - muE.Objective Show full explanation
Question 0Boiling occurs when the vapour pressure of a liquid isA.At the evaporation pointB.Less than the atmospheric pressureC.Greater than the atmospheric pressureD.Equal to the atmospheric pressureE.Objective Show full explanation
Question 0If the magnification of a virtual image formed by an object 10cm from a convex less is 3, then the focal length of the lens isA.10cmB.20cmC.25cmD.15cmE.Objective Show full explanation
Question 0An electron in a hydrogen atom makes a transition from the ground level to the third level. If the energy at the ground level,calculate the energy at the third level. [h = 6.6 x 10-34Js; f = 1015Hz]A.1.41eVB.1.71eVC.1.61eVD.1.51eVE.Objective Show full explanation
Question 0In the diagram above, which of the following velocity-time graphs shows uniform acceleration of a body from rest?A.CB.DC.BD.AE.Objective Show full explanation
Question 0From the diagram above, the measuring accuracy of the micrometer screw gauge isA.4.78mmB.4.16mmC.4.66mmD.4.70mmE.Objective Show full explanation
Question 0In the diagram above, the direction of the force between N and S in the magnetic field isA.MPB.SNC.NSD.PME.Objective Show full explanation
Question 0Which of the following statements is Not true about atoms?A.Atom of different elements have different atomic weightsB.The mass of an atom is concentrated in the nucleusC.An atom is made up of a nucleus and number of electronsD.Atoms of all elements are identicalE.Objective Show full explanation
Question 0The frequency of beats produced when two tunning forks of frequencies 258Hz and 270Hz are sounded close to each otherA.6HzB.264HzC.528HzD.12HzE.Objective Show full explanation
Question 0Calculate the inductance of a coil of resistance 30\(\Omega\) connected to a 100V a.c source if the coil draws an r.m.s current of 2AA.0.60HB.2.50HC.1.25HD.0.04HE.Objective Show full explanation