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Applied Physics Question Paper

Applied Physics

Course:Secondary Level

Exam Year:2012

ST LANGAS HIGH SCHOOL

END OF TERM TWO

MOCK

DATE:6/7/2012

PHYSICS

INSTRUCTIONS:
1.Wrong numbering of answer will lead to deduction of marks.
2.All questions are compulsory.

Q.1.The pressure of helium gas of volumd 10cm3 decreases to one third its original value at a constant temperature. Determine the new volume of the gas. (5 marks)
Q.2.A hole of diameter 1.0mm is made on the side of a water pipe. If the pressure oe the flow is maintained at 300000Nm2,Calculate the force with which the water jets out of the hole.(5 marks)
Q.3.An object 3.0cm high is placed at a distance of 15cm from a convex lens of focal length 9.0cm.
a)Draw a ray diagram to show the position of the image.(2 marks)
b)Determine the magnification of the image.(2 marks)
Q.4.A car of mass 800kg is moving at 25m/s Calculate the force needed to bring the car to rest over a distance of 20m.
(5 marks)
Q.5.A large substation transformer is used to step down voltage from 11000 V to 450 V.Determine the ratio of the number of turns in the primary coil to the number of turns in the secondary coil.
(5 marks)
Q.6.Estimate the size of an oil molecule if a drop of the oil of volume 0.00006m3 forms a patch of diameter 28cm on a water surface.
(5 marks)
Q.7.A car is movin at a velocity of 72km/hr How far does it travel in 0.25 minutes?(5 marks)
Q.8.A body of mass 0.25kg and initially at rest on a horizontal frictionless surface is subjected to a force of 1 newton for 1 second .Calculate:
a)the change in momentum of the body during the time.(5 marks)
b)the change in kinetic energy of the body during the time.(5 marks)
Q.9.A block and tackle with a velocity ratio of 2 is used to raise a load weighing 200N.If the effort required is 150N,calculate:
a)the efficiency of the system.(2 marks)
b) the work done by the effort in raising the load through a vertical height of 4m.(2 marks)
Q.10.A cube of wood of side 10cm floats vertically in water with 4.5cm of its length below the water surface. What is the density of the wood?
(5 marks)
Q.11.A capacitor charged from a 60V d.c. Supply is discharged across a charge-measuring instrument. It is found that the capacitor carried a discharge of 5 microcoulombs. Find the capacitance of the capacitor.(5 marks)
Q.12.The half-life nuclide X is 8 minues.
a)How many half-lives are there in 1 hour? (2 marks)
b)What fraction of its original radioactive mass remains after 16 minutes? (2 marks)

Applied Physics Question Paper

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