Physics
Time Allowed:20 minutes
PAPER CODE M71
Maximum Marks:- 17
(Objective)
Note: You have four choices for each objective type question as A B, C and D. The choice which you think is correct; till that circle in front of that question Number. Use marker or pen to fill the circle. Cutting or filling two or more circles will result in zero mark in that question. Attempt as many question as given in objective type question paper and leave others blank. Use of ink remover or white courting fluid is not allowed.

• The S.I system is built up from how many kinds of units,

(A) One
(B) Two
(C) Three
(D) Four

• The resultant of two forces of magnitude 5N and 10N cannot be

(A) 4 N
(B) 6N
(C) 9 N
(D) 13 N

• Area under velocity- Time graph gives

(A) Displacement
(B) Acceleration
(C) Distance
(D) Work

• How large a force is required to accelerate a body of weight 5N with 4m/sec²

(A) 10 N
(B) 5 N
(C) 2 N
(D) 1 N

• Drag force depends upon

(A) Density
(B) Acceleration due to gravity
(C) Radius of the sphere
(D) Linear acceleration

• 1K.W.h is equal to

(A) 3.6 x 10³ j
(B) 3.6 m j
(C) 4.6 m j
(D) 2.6 m j

• Moment of inertia is measured in

(A) Kg/m²
(B) Kg-m²
(C) N/sec
(D) Rad/sec

• The angular momentum is defined by the equation

(A) L=mv
(B) L=Pxr
(C) L=rxF
(D) L=rxP

• If a gymnast sitting on stool with his arms out stretched lowers his arms

(A) The angular sped decreases
(B) The angular speed Increases
(C) Neither inertial nor non inertial
(D) Both inertial and non-inertial

• The product of time period and frequency is given as

(A) Zero
(B) 1
(C) 2
(D) 3

• The speed of sound in air at OT is 332 m/sec, the speed at 2°C will be

(A) 333.2 m/sec
(B) 335 m/sec
(C) 332.5 m/sec
(D) 232 m/sec

• Stationary waves are generated on a string of length its fundamental frequency is given by

(A) f ₁=
(B) f₁ =
(C) f₁= 2(vx)
(D) f₁ = 

• Two identical tuning forkes are operating simultaneously. The number of bens per second is equal to

(A) Zero
(B) One
(C) Two
(D) Three

• If un-polarized light is made incident on a sheet of polariod, the transmitted beam of light will be

(A) Non plane Polaroid
(B) Plane polarized
(C) Un-polarized
(D) Diffraction

• Which of the following device works on the principle of interference of light

(A) Compound microscope
(B) Newton's ring apparatus
(C) Telescope
(D) Diffraction grating

• Which of the following relation shows adiabatic process?

(A) W=∆u
(B) W= -∆u
(C) W= zero
(D) W= Q

• The value of triple point of water is given as

(A) Zero K
(B) 100 K
(C) 273.16 K
(D) 373.16 K

Physics (Subjective)
Time Allowed: 3.10 hours
Maximum Marks. 83

2. Answer briefly any Eight parts from the followings: (8 x 2 =16)

• Differentiate between Random error and systematic error.
• Write the dimension of (i) Force (ii) Work
• How many years are in one second?
• Give the drawbacks to use the period of a pendulum a time standard.
• State two conditions of equilibrium.
• What are coordinate unit vectors?
• Name three different conditions that could make A₁xA₂=0
• Define Newton's law in terms of momentum
• What is the difference between Elastic and inelastic collision?
• An object is thrown vertically upward. Discuss the sign of acceleration due to gray relative to velocity while the object is in air.
• Explain the circumstances in which the velocity V and acceleration a of a car are
  (i) Parallel
  (ii) Anti parallel
• Define viscous drag and Stoke's law.

3. Answer briefly any Eight parts from the following: (8 x 2=16)

• Define positive work and negative work.
• A girl drops a cup from a certain height, which breaks into pieces. What energy chart are involved.
• An object has 1 J P.E. Explain does it mean? 
• Show S=O
• Explain how minimum number of geo- stationary are satellites is required for global of T.V transmission?
• Show that L_o=mvr
• Define time period and ffequency.
• Can we realize an ideal simple pendulum?
• Name the two characteristics of simple harmonic motion. (x) show V=f
• Explain the term trough and Node.
• How are beats use ful in tuning musical instruments.?

4. Answer briefly any Six parts from the followings:- (6 x 2=12)

• How is the distance between interference fringes affected by the separation between slits of young's experiment?
• Could you obtain Newton's Rings with transmitted light If yes, would the pattern the different from that obtained with reflected light.
• What is optical rotation? Give the use of this property,
• Explain the difference between angular magnification and resolving power of an instrument.
• How the light signal is transmtted through optical fibre.
• Why does the pressure of a gas in a car tyre increases. When it is driven through some distal:
• Give an example of a process in which no heat is transferred to or from the system temperature of the system changes,
• What happens to the temperature of the room when an air conditioner is left running table in the middle of the room.
• Wrote down two postulates of Kinetic, theory gas.

Attempt any three question (8x3=24)

5-(a) Define scalar product? Write its characteristics.
(b) A foot ball is thrown upward with an angle of 3O with respect to the horizontzl how pass. What must be the inaial speed of the ball?

6-(a) Define geostationary satellite. Derive an relation for orbital radius of a Geostatioriory to light
(b) How large a force is required to accelerate an electron (m=9.1x10³¹ Kg) from restmc spec 2x 10⁷ m/sec through a distance of 5.0 cm.

7-(a) What is doppler effect? Derive expression form frequencies of sound heard by listener in foll case
(i) Listener approaches a stationary source
(ii) Source approaches a stationary listener
(b) A block of mass 4.0 kg is dropped from a height of 0.80 m onto a spring of K=1960Nm^-1Find the maximum through which the spring will be compress.

8-(a) Derive the equation for maxima, minima and between two adjacent Young's double slit experiment.
(b) Calculate the critical angle of entry for an optical fibre having core of refractive is cladding of refractive index 1.48

9-(a) State and prove the equation of continuity
(b) A heat engine performs 100 J of work and at the same time rejects 400 J of heat one y to the reservoirs. What is the efficiency of the engine?

10- (a) Answer any four questions,

• What is Screw gauge.
• What is frequency of second’s pendulum
• Define Hooks law.
• What is Rigid body,
• Why do we hear a loud sound in Resonance tube apparatus while doing expe
• What is meant by End Correction?
• What is total internal Reflection
• Define Refractive index.

(b) Write procedure of Experiment time period is dependent on length of simple pettolak___OR___To verify " Law of length", 3

(c) Answer the following question on the basis of graph.

A.(i) Find focal length of lens. (if) For a valueof 1/p=06 find value of ____OR……Answer the following question