Question 1A man walks 1km due east and then 1km due north. His displacement isA.1km N15°EB.1km N30°EC.√2km N45°ED.√2km N45°EE.2km N60°EObjective Show full explanation
Question 2A palm fruit dropped to the ground from the top of a tree 45m tall. How long does it take it to reach the ground(g = 10ms-2) A.9sB.4.5sC.6sD.7.5s E.3sObjective Show full explanation
Question 3Of the following, which is different from the other? A.X-raysB.gamma raysC.cathode raysD.ultraviolet raysE.infrared rays Objective Show full explanation
Question 4Which of the following elements are real magnetic materials? A.Iron, steel and NickelB.copper, steel and ironC.lead, iron and BrassD.glass, lead and steelE.stone, Air and iron Objective Show full explanation
Question 5A 10g mass placed on the pan of a spring balance causes an extension of 5cm. If a 15g mass is placed on the pan of the same spring balance, the extension is A.3.3cmB.6.5cmC.7.5cmD.16.6cmE.15.0cm Objective Show full explanation
Question 6If the pressure on 100cm3 of an ideal gas is double while its Kelvin temperature is halved then the temperature of the gas will become A.25cm3B.50cm3C.100cm3D.200cm3 E.400cm3 Objective Show full explanation
Question 7A substance has a half life of 3 min. After 5 min, the count rate was observed to be 400. What was its count rate at zero time? A.200B.1200C.1600D.2400E.800 Objective Show full explanation
Question 8A room is heated by means of a charcoal fire. An occupant of the room standing away from the fire is warmed mainly by A.conventionB.radiationC.conductionD.reflectionE.induction Objective Show full explanation
Question 9When an atom losses or gains a charge, it becomes A.An electronB.an ionC.a neutronD.a protonE.a cathode Objective Show full explanation
Question 10The process of energy production in the sun is A.nuclear fissionB.nuclear fusionC.electron collisionD.radioactive decayE.electron transfer. Objective Show full explanation