Inter (Part-I) Multan Board 2014
Physics
Part I (Objective Type)
Time Allowed: 20 Minutes 
Max. Marks: 17

Note: Four possible answers A, B, C and D to each question are given. The choice which you think is correct, fill that circle in front of that question with Marker or Pen ink in the answer-book. Cutting or filling two or more circles will result in zero mark in that question.

Question #1
Circle the correct option i.e. A/B/C/D. Each part carries one mark.

• The mass of an object is %quantitative measure of its:

(a) Momentum
(b) Energy
(c) Acceleration
(d) Inertia

• The escapes velocity is maximum for:

(a) Moon
(b) Mercury
(c) Earth
(d) Jupiter

• A man is a lift is moving upward with constant velocity will conclude that his weight has:

(a) Increased
(b) Decreased
(c) Reduced to zero
(d) Not changed

• The direction of angular Velocity is along the:

(a) Radius away from the centre
(b) Axis of rotation
(c) Radius toward the centre
(d) Radius away from the centre

• Rotational K.E. or a hoop is:

(a) mv²
(b) mv²
(c) 2mv²
(d) mv

• ________ has minimum viscosity:

(a) Air 
(b) Water
(c) Glycerin
(d) Acetone

• The acceleration of a body having SHM, depends upon its:

(a) Time period
(b) Amplitude
(c) Frequency
(d) Displacement from mean position

• If the organ pipe is open at one end and closed at the other, then its frequency fundamental harmonic is:

(a) ƒ₁ = v/2ℓ
(b) ƒ₁ = v/4ℓ
(c) ƒ₁ = 2ℓ/vℓ
(d) ƒ₁ = 4ℓ/vℓ

• The number of nodes between two consecutive antinodes is/are.

(a) One
(b) Two
(c) Three
(d) Four

• The velocity of sound 0°C is 332ms^-1. The velocity of sound at 10°C will be

(a) 337.1ms^-1
(b) 338.1ms^-1
(c) 342.1ms^-1
(d) 348.1ms^-1

• The fringe spacing increases it we use:

(a) Red light
(b) Blue light
(c) Gran light
(d) Yellow light

• The infra-red light used in the fibre optic communication system has typical wave length equal to:

(a) 1.1 μm
(b) 1.3 μm
(c) 1.5 μm
(d) 1.7 μm

• The number of spark plugs used in the diesel engine is equal to

(a) 0
(b) 1
(c) 2
(d) 3

• An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at:

(a) 0.K
(b) 0°C
(c) 100 K
(d) 100°C

• ______________ is not a derived unit:

(a) Newton
(b) Joule
(c) Coulomb
(d) Ampere

• The resultant of two vectors having magnitude 10N and 8N cannot be:

(a) 2N 
(b) 9N 
(c) 18N
(d) 20N

• The slope of velocity-time graph shows:

(a) Total distance covered
(b) Average acceleration
(c) Instantaneous acceleration
(d) Force exerted on the box

Inter (Part-I) Multan Board 2014
Physics
Part I (Subjective)
Time Allowed: 2.10 Hours 
Max. Marks: 83 

Section I

Q.2 Attempt any eight parts

• Why do we find it useful to have units for the amount of substance the kilogram and the mole
• Give the drawbacks to use the period of a pendulum as time standard
• Assess the total uncertainty in the final result of a timing experiment with the help of an example
• Find the dimensions of viscosity in case of drag force of an object is given by F = 6πդrV
• Two vectors have unequal Can their sum be zero explain.
• The vector sum of three vectors gives a zero resultant. What can be the orientation of the vectors?
• Can you add zero to a null vector
• Can the velocity of an object reverse the direction when acceleration is constant If so, give an example.
• Explain the circumstances in which velocity V and acceleration of a car are (a) Parallel (b)Anti-parallel
• At what point or points in its path dose a projectile has its minimum speed its maximum speed
• What is the time of flight of a projectile motion?
• Explain bow the swing is produced in a fast moving cricket ball

Q.3 Attempt any eight parts 8 x 2 = 16

• Calculate work done in kilo joules in lifting a mass of 10 Kg through a vertical height of 10m
• When a rocket re-enters the atmosphere its nose becomes very hot where dose this heat energy come from?
• State work-Energy principle
• What is meant by moment of inertia? Explain
• Explain difference between tangential velocity and angular velocity
• What is Artificial Gravity?
• Name two characteristics of simple harmonic motion
• What is the total distance travelled by an object moving with SHM in a time equal to its period if its amplitude is A
• Differentiate between free and forced oscillations
• What features do longitudinal waves have in common with transverse waves?
• Define the perms Crest and trough
• What is the effect of temperature on the speed of sound in gas?

Q.4 Attempt any six parts 6 x 2 = 12

1. Explain whether the young’s experiment is an experiment for stuying interference or diffraction effects of light
2. Could you obtain newton’s rings with transmitted light? If yes would the pattern be different from that obtained with reflected light
3. Why the Polaroid sunglesses are better than ordinary sunglasses
4. What do you understand by linear magnification and angular magnification
5. If a person was looking through a telescope at the full moon how would the appearance of the moon be changed by covering half of the objective lens
6. State second law of thermodynarnics in terms of entropy
7. Why is the average velocity of the molecules in a gas zero but the average of the square of velocities is not zero
8. A thermos flask containing milk as a system is shaken rapidly does the temperature of milk rise?
9. Is it possible to construct a heat engine that will not expect heat into the atmosphere

SECTION -II

NOTE: Attempt any three question of the following

Question #5
(a) State and prove the law of conservation of linear momentum 1+4
(b) Find the angle between the two vector A = 5 iˆ + jˆ and B = 2iˆ + 4jˆ

Question #6
(a) Define gravitational field show that in gravitational field work is independent of path followed by the body
(b) A 1000 Kg car is travelling with a sped of 144 Kmh^-1 round a curve of radius 100m. Find the necessary centripetal forte.

Question #7
(a) Explain phenomena of Resonance. Also give examples whey resonance plays an important role.
(b) An organ pipe has a length of 50cm. fine the frequency of its fundamental note and the next harmonic when it is (a) open both ends (b) closed one end.

Question #8
(a) What is Compound Microscope? Give as construction work as and starve the expression for angular magnification.
(b) Sodium light of wavelength 589 nm is incident normally no a grating having 3000 lines per Centimeter what is the highest order of the spectrum obtained with this grating.

Question #9
(a) state and derive Equation of Continuity
(b) What is the average Translational Kinetic Energy of molecules in a gas temperature 27°C

SECTION.III (PRACTICAL)

Question #10
(A) Write answers of any four parts. 4 x 2 = 8

• Define zero error of Vernier Callipers
• What is meant by Moment Arm?
• Define Couple.
• What is Hook's Law
• Define Node and Antinodes.
• Define Parallax.
• What is Refraction of Light?
• What is Diffraction Grating?

(B) Write brief procedure to show that time period of Simple Pendulum is independent of amplitude.
OR
Write brief procedure to find the area of wire by using Screw

(C) Answer the following questions on the basis or graph drawn helow

• What type of graph will be obtained in case of direct proportionality
• Find the value of (3.7)² from the graph

image

OR

image

Answer she following questions on the basis of graph drawn below

• Who do you conclude from this graph?
• Find the slope of the graph