Physics  (Objective) 
(Group-I)
 Paper(I)
TIME:20 minutes 
Maximum Marks: 17

NOTE: You have four choices of objective type questions as  A , B , C, D. The choice which you think is correct ,fill that circle in front of that question number. Use marker or pen to fill the circles. Cutting or filling two or more circles will result in zero mark in that question. Attempt as many questions as given in objective type question paper and leave others lank. Write the letter A , B , C, or D in the column(write correct option) against each question. If there is a contradiction in the bubble and hand written answer, bubble option will be considered correct.

• Radian and Steradian are:-
  

(A) Base Units                                           
(B) Derived Units    
(C) Supplementary Units                           
(D) Complementary Units    

• The dimensions of coeffiecient of viscosity is:
  

(A) [M2 L-1 T-1]                                          
(B) [ML-1T-2 ]
(C) [ML-1T-1]                                             
(D) [MLT]  

• The cross product of vectors will be minimum when angle between vectors is:
  

(A) 350                                                  
(B) 900
(C) 00                                                   
(D) 450

• If a body is at rest than it will be in :

(A) State equilibrium                            
(B) Dynamic equilibrium   
(C) Translational equilibrium               
(D) Unstable equilibrium   

• The area between the velocity time graph is equal to:

(A) Distance  
(B) Acceleration
(C) Velocity  
(D) Speed

• Nm is equal as:

(A) Pascal         
(B) Newton
(C) Henry     
(D) Joule

• Time rate of change of angular velocity is called :

(A) Angular velocity                           
(B) Angular acceleration
(C) Angular displacement                            
(D) Angular distance

• The rate ot change of angular velocity is called:

(A) Angular velocity                     
(B) Angular acceleration
(C) 3 g                                             
(D) Angular Speed

• The roatational K.E. of a body is given by:

(A) ½ IW3                                    
(B) ½ IW2           
(C) W2                                               
(D) ½ IW2           

• An object moving through a fluid experience a retarding force called:

(A) Drag force                                     
(B) Gravitational force    
(C) Terminating force         
(D) Frictional force    

• The time required to complete one vibration is called

(A) Time Period                                       
(B) Frequency
(C) Vibration                                                 
(D) Amplitude

• The example of mechanical waves is:

(A) Water and air waves        
(B) Radio waves 
(C) infra red waves 
(D) Ultra violet waves 

• When path difference is an integral multiple of wave lengths, the effect is called:

(A) Coherency                                              
(B) Destructive interference
(C) Constructive interference                                                  
(D) Phase lag

• All waves fronts are concentric:
  

(A) Circles                                        
(B) Squares
(C) Spheres                                          
(D) Rectangles

• The phenomena which proves that the light is transverse wave is:

(A) Interference
(B) Polarization
(C) Diffraction           
(D) Compton effect

• A device used for viewing distinct objects is called:

(A) Telescope                                      
(B) Spectrometer
(C) Microscope                                  
(D) Magnifying glass

• The process in which no heat enters or leaves the system is known as:

(A) Adiabatic                              
(B) Isothermal
(C) Isochroic                              
(D) Isobasic

• By increasing temperature, the Kinetic energy is:

(A) Decreased                            
(B) Increased
(C) Remains same            
(D) never changed

Physics  (Objective)
Group-I)
Paper(I)
TIME:2.40 Hours 
Section----I  
Maximum Marks: 68

2: Attempt any EIGHT short (questions)  (8x2=16)

• Differentiate between Base Units and derived Units.
• How many nanoseconds in one year.
• Write the dimension of (a)pressure (b) Force (iv) Can you add zero to a null vector?
• If ̅A+ ̅B = 0,what can you say about the components of two vectors? 
• Explain first and second conditions of equilibrium.
• By using the formula ,show that the range of projectile is maximum , when projectile is thrown at an angle at 45°   with the horizontal.
• Explain the circumstances in which the velocity ̅V and acceleration  ̅a of a Car are (a) Anti parallel   (b) Perpendicular to one another
• Can the velocity of an object reverse the direction when acceleration is constant? If so, give an example.
• List the possible energy changes when a girl drops a cup from a certain height, which breaks into pieces.
• What is power? How it is related with velocity. Explain.(xii) Calculate the work done in Kilo Joules when when 10 Kg Crate is pushed through 4 m across the floor with a force of 50 N.

3: Answer briefly any EIGHT parts from the followings (8x2=16)

• When mud flies off the tyre of a moving bicycle, in what direction does it fly? Explain.
• Show that orbital angular momentum L0 =mvr
• The Earth’s satellites, being gravity free system , are freely falling in space , do not reach the earth. Explain why?
• What do you understand by the term viscosity?
• Differentiate between stream line and irregular flow of fluids.
• Two row boats moving parallel in the same direction are pulled towards each other.Explain.
• Give any two applications of resonance.
• Can we realize an ideal simple pendulum.
• Name two characteristics of simple harmonic motion.
• Explain why sound travels faster in warm air than in cold air.
• How are beats useful in tuning musical instruments?
• State principle of super position of waves.
  

4. Answer briefly any SIX parts from the followings  ( 6x2=12)

• What is Diffraction Grating? 
• Under what conditions two OR move sources of lightbehave as Coherent Source.
• Why the Polaroid Sunglasses are better thn ordinary Sunglasses?
• Define Angular magnification.
• What do you understand  by linear magnification ? Explain how a Convex lens is used as a magnifier?
• How the light signal is transmitted through the optical fibre?   
• State two postulates of Kinetic theory of gases.
• Why is the average velocity of the molecules in a gas Zero but the Average of the Square of Velocities is Not Zero?
• Is it possible to convert internal Energy into mechanical energy? Explain with an example.

Section----II

Note : Attempt any three questions.  (8x3=24)

5.(a) Define Scalar Product, Explain its four characteristics.         1+4
(b) A 1500 Kg Car has its velocity reduced from 20ms-1 to 15 ms-1  in 3s.How large was the average retarding force.   3

6.(a) What is meant by centripetal force. Derive relations for centripetal force and centripetal acceleration.         5
(b) Ten bricks each 6 cm thick and mass 1.5 kg ,lie flat on a table.How much work is required to stake them on the top of another.     3

7.(a) What is Carnot engine.Discuss Carnot Cycle.Find out efficiency of Carnot engine.          1+2+2
(b) How large must a heating duct be if air moving 3.0 m/s along it can replenish the air in a room of 300 m3 volume every 15 mint. Assuming the air density remains constant. 3                 

8.(a) What is Simple Harmonic motion , show that motion of mass,m, attached to a spring of spring constant K, is SHM. System is considered to be friction less.    5
(b) An organ pipe has a length of 50 cm. find the frequency of its fundamental note when it is closed at on end.

9.(a) What is thin films? Explain the construction and working of michelson’s interferometer.             1+2+2      
(b) A telescope is made of an objective of focal length 20 cm and an eye piece of 5.0 cm,both convex lenses. Find the angular magnification and length of the telescope in normal adjustment.