MILITARY COLLEGE MURREE SEND UP EXAM PHYSICS

MILITARY COLLEGE MURREE
SEND UP EXAM PHYSICS,SSC – I 2018
Time allowed: 2 Hrs 40 Mins Total Marks Section B and C: 53
Answer all parts of Section ‘B’ and two questions from Section ‘C’. Write your answers neatly and legibly.
Section-B (33 Marks)  
Q-2Write short answers of the following. Answers should not exceed three to four lines.(11 x 3 = 33)
a.Convert 1gm cm -3 into Kg m-3
b.What do you mean by the least count of a vernier calliper. Write mathematical expression.

c.A cyclist completes one round of circular track of diameter 636m in 1.5 minutes. Find his velocity.

d.Define inertia. Describe the factors on which inertia depends.

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e.Can a fat (heavy) child play with a small (light) child on a sea saw? Explain.

f.On the surface of earth weight of a boy is 400 N but on the mountain peak his weight is 360N. Calculate value of g on the mountain peak.

g.Write down three methods for reducing friction.

h.Define stress and strain.

i.Differentiate between nuclear energy and chemical energy.

j.What do you mean by the efficiency of a system? Why practically the efficiency of a system cannot be 100%.
k.Define centre of gravity and centre of mass.

Section- C (20 Marks)
Note: – Attempt following questions. All questions carry equal marks. (2 x 10 = 20)
Q. 3.

a.What is Law of Gravitation? Derive a relation for mass of earth by using Law of Gravitation. Calculate mass of earth. (Radius of earth is 6.4 x 106 m) (2 + 2+2)
b.A nut has been tightened by a force of 200N using a 10cm long spanner. What length of spanner is required to loosen the same nut with force of 150 N? (4)
Q. 4.

a.Define and derive expression for Archimedes Principle. (1 + 3)
b.Differentiate between Conduction and Radiation of heat. How land and sea breezes blow? (3)
c.How much heat is lost in an hour through a glass measuring 2m x 2.5m when inside temperature is 250C and outside is 50C.Thickness of the glass is 0.8cm and value of K for glass is 0.8Wm-1K-1 (3)
Instr:________________HoD:__________________
College No.______________Section.__________
MILITARY COLLEGE MURREE
SEND UP EXAM PHYSICS,SSC – I 2018
Time allowed: 20 Mins Total Marks: 53
Section A is compulsory. All parts of this questions are to be answered on question paper itself. Deleting /over writing is not allowed. Do not use lead pencil. .

Q-1Circle the correct option i.e A, B , C, D. Each part carries one Mark.

A body of mass 1 Kg is moving with velocity 2m/sec. Its K.E will be:
A. 2 JB. 4 JC. 6 JD. 8 J
Which of the following is a vector quantity?
A. SpeedB. AccelerationC. PowerD. Energy
c.The SI unit of stress is:
A. NmB. Nm -1 C. Wm 3 D. Nm -2
d.Sea and land breezes blow due to __________ of heat:
A. ConductionB. ConvectionC. Radiation D. Temperature
e.The SI unit of tensile strain is:
A. JouleB.NewtonC.VoltD. None
f.Two equal but unlike parallel forces having different line of action produce:
A. TorqueB. CoupleC. ForceD. Momentum
g.The number of forces that can be added by head to tail rule are:
A. 2B.3C.4D. any number
h.Newton’s First Law is valid only in absence of:
A. ForceB. Net ForceC. FrictionD. Momentum
i.Motion of a body about an axis is called:
A. Circular motionB. Rotatory motionC. Vibratory motionD. Random Motion
j.Moon completes one revolution around the earth in :A. 25.3 daysB. 27.3 daysC. 30.3 daysD. 33.3 days
k.In nuclear reactor the type of energy produced is:
A. Chemical EnergyB. Atomic EnergyC. Nuclear Energy D. Light Energy
l.A rocket is propelled in space on basis of Newton’s Law:
A. 1st LawB. 2nd Law C. 3rd Law D. Law of Gravitation
Instr:______________HoD:___________________