Question 1Which of the following is correct about cathode rays. They are fast movingA.atomsB.neutronsC.electronsD.ionsObjective Show full explanation
Question 2Which of the following has the highest surface tensionA.soapy waterB.cold waterC.warm waterD.salt waterObjective Show full explanation
Question 3A truck travelling with a velocity of 40 m/s applies the brakes and comes to a halt after 20s. what is the distance travelled by the truck before coming to a haltA.40mB.800mC.400mD.10mObjective Show full explanation
Question 4If the linear expansivity of a metal rod is 4 × 10-5 per °C. what will be the new length of the rod if it is heated from 15°C to 95°C from its original length of 20cmA.0.064cmB.0.64cmC.20.64cmD.20.064cmObjective Show full explanation
Question 544kj heat was used in raising the temperature of 2kg of paraffin oil from 360k to 370k. Calculate the specific heat capacity of paraffin oil.A.2.2j/kg/kB.2.2 × 100³j/kg/kC.2.2 × 105j/kg/kD.220j/kg/kObjective Show full explanation
Question 6A simple machine overcomes a load 400N when a force of 200N is applied. If the velocity ratio of the machine is 25, calculate the efficiency of the machineA.1.25%B.80%C.125%D.0.8%Objective Show full explanation
Question 7A long sighted person is to read a book held at a distance of 20cm from the eyes Which of the following will the person require to read the book with ease?A.nothingB.concave lensC.convex lensD.concave mirrorObjective Show full explanation
Question 8An object at the bottom of a pool of liquid 10m deep is seen by an observer as if it is at 8m deep. What is the refractive index of the liquidA.0.25B.0.20C.1.25D.0.8Objective Show full explanation
Question 9Which of the following has the highest surface tension?A.soapy waterB.cold waterC.warm waterD.salt waterObjective Show full explanation
Question 10The emf deceloped in a circuit is direcly proportional to the rate of change of magnetic flux. The above was a finding fromA.MaxwellB.FaradayC.AmpereD.LenzObjective Show full explanation