Download MODEL QUESTION PAPER HSE I PHYSICS Time: 2

MODEL QUESTION PAPER
HSE I PHYSICS
Time: 2 ½ hours
1) a)The acceleration of an object moving in a straight line is equal to ……….. (1)
b) In rotational motion, the quantity analogous to force in linear
motion is ………..
(1)
(Total 2)
2) a) If the percentage error in the measurement of radius R of a sphere is 2%
then what is the percentage error in the volume?
(1)
b) State the principle used to prove the equation T = 2π√ l/g dimensionally. (1)
(Total 2)
3) A body is thrown vertically upward into air with an initial velocity U
a) What will be the velocity at its maximum height? Why?
(1)
b) Find the time taken to reach the maximum height?
(1)
c) When air resistance is taken into consideration if is found that the time of
ascent< Time of descent. Is this statement is true? Justify your answer. (2)
(Total 4)
4) An athlete throws a Javelin at an angle ' ' with horizontal.
a) Give the horizontal and vertical component of velocity of projection
(1)
b) At highest position, what are the vertical and horizontal components of velocity?
(1)
c) Taking vertical component of velocity arrive at an equation to find the maximum
height reached by the Javelin.
(2)
d) State whether true or false: " For the javelin the vertical component and
horizontal component of velocity are independent of each other."
(1)
(Total 5)
5) A woman stands on a spring scale on an elevator. In which case will the scale
record the minimum and maximum reading? Give reasons for each case.
a) Elevator stationary
(1)
b) Elevator cable breaks free fall.
(1)
c) Elevator accelerating upwards.
(1)
d) Elevator accelerating downward.
(1)
(Total 4)
6) A horse pulls a cart with a constant force so that the cart moves with a constant
speed.
a) Does it violates Newton's 2nd law of Motion?
(1)
b) A body of mass 5kg is acted upon by two perpendicular forces 8N and 6N. Give
the magnitude and direction of the acceleration of the body.
(2)
(Total 3)
7) Answer the followings with reasons.
a) In an elastic collision of two billiard balls, is the total Kinetic energy conserved
during the short time of collision of the balls, ie when they are in contact?
(2)
b) Is the linear momentum conserved during the short time of an elastic collision of
two balls?
(1)
(Total 3)
8) Moment of Inertia (MI) of a thin ring of radius 'R' about an axis passing through
any diameter is ½MR²
a) MI of the same ring about an axis passing through any tangent, which of the
following theorem is used? State the theorem?
i) Parallel axis theorem
II) Perpendicular axis theorem
(1½)
b) What is the radius of gyration of the ring about an axis passing through any
diameter?
(1½)
c) A thin metal ring of radius 0.25m and mass 2 kg starts from rest and rolls dawn
in an inclined plane. If the linear velocity on reaching the foot of the plane is 2 m/s ,
calculate its rotation KE at that instant.
(2)
(Total 5)
9) a) State Newton's Universal law of gravitation
(2)
b) Define acceleration due to gravity. Obtain an expression for acceleration de to
gravity.
(2)
(Total 4)
10) The stress - strain graph of two bodies A and B are given in the figure. The
graphs are to the same scale.
1.
2.
3.
4.
Which material has greater young's modules?
Which material is more ductile?
Which is more brittle?
Which of the two is stronger material?
(1 )
(1)
(1)
(1)
(Total 4)
OR
a) Two wires of radius 0.2cm, one made of steel and the other made of brass are
loaded as shown in fig. The young's module of steel is 2 X 10¹¹ and that of brass is
10¹¹ Pa. Calculate the elongation in steel and brass wires. (1 Pa = N/m² ). (2)
b) Draw the stress-strain diagram and mark the positions of the elastic limit and
the regions of elastic and plastic behaviour.
(2)
(Total 4)
11) A Carnot engine operating between a source at temperature T₁ K and a Sink at T₂
K
a) Is the engine is reversible or irreversible? Explain
(1)
b) Draw the Carnot cycle
(1)
c) What are the thermo dynamic processes included in the Carnot cycle?
(1)
d) Is it possible to make engine 100% efficiency? Explain.
(2)
(Total 5)
12) a) What is Venturimeter?
b) State the principle of its working
(1)
(1½)
(Total 2½)
13) Match the items of the column I with the corresponding items of column II
Column I
a) Rate of flow of a liquid
b) Flow of a liquid
c) Flow of heat.
d) Flow of charge
e) Fundamental equation of fluid flow
Column II
a) Equation of continuity.
b) Potential Difference.
c) Poiseiulle's formula.
d) Temperature difference
e) Difference in the levels of a
liquid
(5 X ½= 2½ )
14) a) What do you mean by an ideal gas?
b) From the Kinetic Theory of gases, explain the various gas laws
(1)
(2)
(Total 3)
15) Oscillations of a body suspended by a spring is an example of SHM
a) Define SHM(Simple harmonic Motion). Give its general equation.
(2)
b) Write the expression for the time period of oscillation?
(1)
c) A girl is swinging in a swing in the sitting position. How will the
period the swing be affected if she stands up?
(1½)
d) What are free oscillations? Give the equation for its natural frequency (1½)
(Total 6)
16) A string is stretched between the fixed between the fixed supports and a note of
sound is heard when it is plucked at the middle point.
a) State whether the sound propagated as longitudinal wave or transverse wave (1)
b) Derive an expression for the frequency of sound produced in the fundamental
mode of vibration.
(2)
c) The equation of a wave is given by " y= 2.2(300t-0.24x) ". If the units of y,t, and x
are milli meter , second, and meter respectively deduce:
1. the amplitude
2. the frequency
3. the wave velocity
4. the amplitude of particle velocity
(2)
(Total 5)
Question Paper Prepared By Asha T P -11163, Geetha Lakshmi R -11149,
Jisha J B-11047 Preethy A P- 11163, Shyni P - 11161