Question 1An open organ pipe has a length of 6m. If the speed of sound in air is 340m/s and neglecting the end corrections, the frequency of its first overtone isA.56.67HzB.28.33HzC.85HzD.1.3kHzObjective Show full explanation
Question 2A piano wire 0.5m long has a total mass of 0.01 kg and is stretched with a tension of 800N. The frequency of its fundamental note is: A.400HzB.100HzC.200HzD.300HzObjective Show full explanation
Question 3Two capacitors of 8F and l0F connected in series to a 100V supply. The charge on either plate of each capacitor is: A.2.25 X 10-3CB.4.4CC.4.4 X 10-3CD.4.4 X 10-3CObjective Show full explanation
Question 4A conductor of length 5m carrying a current of 15A is placed in a uniform magnetic field of flux density 0.25T. If the conductor is placed at 60° to the field then the force on it is: A.18.75NB.9NC.16.24ND.35NObjective Show full explanation
Question 5When an inclined plane of angle is used as a simple machine, its velocity ratio is: A.1/cosθB.cosθC.1/sinθD.sinθObjective Show full explanation
Question 6Which ofthe following statements is not true of a real image formed by a concave Mirror? A.It is invertedB.It is erectC.It can be observed on a screenD.NoneObjective Show full explanation
Question 7A 8kg mass rests on an inclined plane. If the limiting frictional force 50N and g = 10m/s2, then the angle of inclination of the plane is: A.37.8°B.38.7°C.87.3°D.78.3°Objective Show full explanation
Question 8Which of these gives the dimension of Torque? A.MLTB.ML-1T-2C.ML-1T-2D.ML2T-2Objective Show full explanation
Question 9An object of mass 80kg is kicked above the ground and in 20s it has reached a height of 600cm. Calculate the power of the object. A.40WB.240WC.402WD.204WObjective Show full explanation
Question 10Which of these statements is true? A.Energy cannot be destroyed and cannot be transformed from one form To anotherB.Momentum befor impact is not necessarily equal to momentum after impactC.Impulse is the product of force and timeD.In perfectly elastic collision, there is a small loss of energy.Objective Show full explanation
Question 11A load of 2 tonnes is raised with 10N efforts. Calculate the mechanical advantage of the machine with which the load is raised. A.200NB.0.20NC.2000ND.102NObjective Show full explanation
Question 12An object of mass 4000g is 60cm above the ground. Calculate its kinetic energy 50cm above the ground (Take g 10m/s2) A.4JB.40JC.4ND.40NObjective Show full explanation
Question 13A fast moving object of mass 200g travel at 100m sand hits a block of wood of mass 2kg. The two bodies moved together after impact. Find the velocity with which they moved together after collision. A.9.09m/sB.90.9m/sC.0.910m/sD.1.96m/s.Objective Show full explanation
Question 14Determine the distance traveled by a particle whose initial velocity is 48 km/h, The particle accelerated uniformly at the rate of 1.8m/s2 and attained a velocity of 72 km/hA.6.167mB.61.67mC.616.7mD.6167mObjective Show full explanation
Question 15An object floats in a liquid with one third of )volume above the liquid surface. Determine the density of the liquid, if object density is 7100kg/m3 (Take g = 10m/s2). A.1056kg/m3B.1560kg/m3C.10650kg/m3D.15.60kg/m3Objective Show full explanation
Question 16A metal block of mass 2125g displaces 250cm3 of water. What is its density? A.8300kg/m3B.8800kg/m3C.8500kg/m3D.8700kg/m3Objective Show full explanation
Question 17A body starting from rest travel for 100s with uniform acceleration of 1.5m/a. What distance does it cover in the last 2 seconds? A.27.0mB.26.2mC.29.8mD.30mObjective Show full explanation
Question 18A pile driver of mass 125kg falls through a height of 80m before striking the pile. What is it's momentum at the instance it strike the pile? g = 10m/s2A.40kg.m/sB.5000kg.m/sC.1600kg. m/sD.5000kg.mObjective Show full explanation
Question 19A gun weighing 1500kg fires as shot weighing 50kg with a velocity of 360 m/s. What is the recoil velocity of the gun ? A.14.0m/sB.12.0m/sC.11.0m/sD.13.0m/sObjective Show full explanation
Question 20A car of mass 1000kg travels with a velocity of 45km/h on a rough road and it is brought to a restaurant after 10s. What is the force exerted on the car?A.1333NB.1250NC.1282ND.1067NObjective Show full explanation