Physics   D
Inter (Part-I)  
Paper Code No.2477
Paper I (Objective Type)
(Inter –A-Part-I)
Marks : 17
Session (2011-2013)
  Time : 20 Minutes 
     L..K.No.707-16600

Note:Write answers to the questions on the objective answer sheet provided. Four possible answers A , B , C , D to each question are given. Which answer is correct, fill the relevant circle with pen ink to each question on the answer sheet provided.

• The prefix Pico is equal to :
  

(A) 10^-6                 
(B) 10^-12                    
(C) 10^-18  
(D) 10^-11

• The direction of Torque can be found by :
  

(A) Head to Tail Rule       
(B) Right Hand Rule              
(C) Left Hand Rule            
(D) Fleming Rule

• →        + →     = →    + →     , this shows that addition of vectors is :
  A             B          B        A

(A) Associative       
(B) Commutative                    
(C) Additive                   
(D) Additive Inverse

• Supplementary Units are:       
  

(A) 2    
(B) 3          
(C) 4              
(D) 5

• The ballistic missiles are useful only for:
  

(A) Long Range                  
(B) Short Range                     
(C) Intermediate Range       
(D) Zero Range

• Torque acting on body is given by:
  

(A) τ = I2        
(B) τ = Iα2                  
(C) τ = I2α2                 
(D) τ = Iα

• The angle through which a body moves is called:

(A) Angular Velocity                         
(B) Angular Acceleration                   
(C) Angular Displacement                 
(D) Angular Momentum

• Which one is Biofuel :
  

(A) Water                   
(B) Petrol       
(C) Ethanol                
(D) Oil

• Bernoullis’ Theorem is applicable to:
  

(A) Solids       
(B) Plasma State                    
(C) Fluids                   
(D) Liquids

• Stars moving towards the earth show:
  
  (A) Blue shift 
  (B) Red Shift             
  (C) No Shift   
  (D) Longer Wavelength
• The Laplace’s Equation for speed of sound in gas :
  

(A) √P/ζ         
(B) √E/ζ                     
(C) √γP/ζ                    
(D) √γζ/P

• Tuning a Radio is the best example of:
  

(A) Mechanical Resonance                
(B) Light wave Resonance    
(C) Electrical Resonance                    
(D) Physical Resonance

• The center of Newton’s Rings is ------------ due to destructive interference:
  

(A) Bright  
(B) Dark         
(C) Colourless    
(D) Glass Wire

• Cloud formation in the atmosphere is example of :

(A) Adiabatic Process
(B) Isothermal Process
(C) Isochoric Process 
(D)Isobasic Process

• 2dsinθ = nλ is called:

(A) Laplace’s Equation
(B) Reflection Equation
(C) Refraction Equation
(D) Bragg Equation

• It becomes possible to send light into inaccessible places due to:

(A) Coaxial Cable
(B) Fibre Optic     
(C) Copper Wire
(D) Glass Wire

• Mathematically Entropy is represented by:

(A) Q= ∆S/T              
(B) ∆S=∆Q/T
(B) ∆S = QT               
(D) ∆S=∆T/Q

Roll No. 707-14600       
Physics (Subjective)
Inter-A-2012
Inter ( Part – I )
Time = 2:40 Hours 
Session (2011-13)
Total marks: 68

Note: It is compulsory to attempt (8) parts each from Q.No.2 and Q.No.3 while attempt 6 parts from Q.No.4 and attempt any (03) questions from Part II. Write same questions no. and its part no. as given in the question paper.

Part I :22x2=44

Q.No.2

• Add the masses given in Kg up to appropriate precision : 2.189,0.089,11.8  and 5.32.
• Give the drawbacks to use the period of a pendulum as a time standard.
• Write the dimensions of :   
  (i) Pressure      (ii) Density
• What is the unit vector in the direction of the vector A=4i + 3j
• Can a body rotate about its center of gravity under the action of its weight?
• Two vectors have unequal magnitudes. Can their sum be zero? Explain.
• Define Impulse and show that it is equal to change of momentum.
• Can the velocity of an object reverse the direction when acceleration is   constant? If so give an example.
• Explain the circumstances in which the velocity “v” and acceleration “ a “ of a car are :
  (i) Parallel  (ii) Perpendicular to one another.
• Agirl drops a cup from a certain height, which breaks into pieces. What energy changes are involved?
• Show that work done on a body is equal to the change in its Kinetic Energy.

Q.No.3.

• Explain what is meant by Centripetal Force and why it must be furnished to an object if the object is to follow a circular path?
• Why does a diver change his body positions before and after diving in the pool?
• Why the microwaves are used in Satellite Communications?
• Differentiate between Laminar Flow and Turbulent Flow.
• A person is standing near a fast moving train. Is there any danger that he will  fall towards it?
• Describe the method of measuring Human Blood Pressure.
• Does frequency depend on Amplitude for Harmonic Oscillator?
• Describe some common phenomena in which resonance plays an important role.
• What is the difference between Free and Forced Oscillations?
• As a result of distant explosion an observer senses a ground tremor and then hears the explosion.
• State the principle of Super  Position of Waves.
• Why does sound travel faster in solids than in Gases?
  

Q.No.4.

• Give conditions for Constructive and Destructive Interference.
• How would you distinguish between Unpolarized and Plane Polarized Light?
• A Oil Film spreading over a wet footpath show colours. Explain how does this happen?
• Write three parts of Spectrometer.
• How the Power is last in Optical Fiber through Dispersion? Explain.
• What is Resolving Power of Optical Fiber through Dispersion? Write formula for grating.
• Define Cp and Cv.
• What does the pressure of a gas in a tyre increases when car is driven through some distance?
• Is it possible to construct a Heat Engine that will not expel Heat into the atmosphere?
  

Q.No.5. (a)Explain the method of Vector Addition by rectangular Components for two vectors.       (5)
(b) A ball is thrown with a speed of 30ms^-1 in a direction 300 above the horizon.                             (3)

Q.No.6. (a) What are Geostationary Satellite? Derive an expression for orbital radius of a Geostationary Satellite.       (5)
(b) A child starts from rest at top of a Slide of height 4m. What is the speed at bottom if slide is frictionless?                 (3)

Q.No.7. (a) Define Molar specific Heats of a Gas. Show the difference of Molar Specific Heat at constant pressure and at constant volume is equal to Universal Gas Constant.      (5)

Q.No.8. (a) Define Simple Pendulum. Show that its motion is S.H.M.     (5)
(b) A Stationary Wave is establish in a string which is 120 cm long and fixed at both ends. The string vibrates in four segments at a frequency of 120 Hertz. Determine its wavelength and the fundamental frequency.       (3)

Q.No.9. (a) Describe Young’s Double Slit experiment and find the relation for Fringe Spacing.    (5)
(b) An astronomical telescope having magnifying power of 5 consists of two thin lenses 24 cm apart. Find the focal lengths of the lenses.    (3)