Inter (Part-I) Bahawalpur Board 2016
Physics
Part I (Objective Type)
Time Allowed: 20 Minutes 
Max. Marks: 17

Note: Four possible choices A, B, C and D ,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.

• Slope of velocity time graph represent

(a) average velocity
(b) average acceleration
(c) average speed
(d) instantaneous velocity

• Dot product of two vectors is equal to the product of their magnitude if angle between them is

(a) 90
(b) 0
(c) 180
(d) 45

• Light year is the unit of

(a) time
(b) velocity
(c) intensity
(d) Distance

• The unit of Kgms-1 can be written as

(a) Ns
(b) N
(c) Js
(d) Ns^-1

• Angular velocity is measured in

(a) ms^-1
(b) Revolution per Minute
(c) rads^-1
(d) rad/min

• The dimension of moment of inertia are

(a) [ML²]
(b) [ML^-2]
(c) [ML^-1]
(d) [M²L]

• Which one of the following is not a conservative force

(a) Gravitational force
(b) Elastic spring force
(c) Frictional force
(d) Electric force

• Direction of centripetal acceleration is

(a) Along the tangent to the circle
(b) Along the radius towards the centre
(c) Along the radius away from centre
(d) Along the axis of rotation

• The wavelength of the fundamental mode of vibration of a closed pipe end is

(a) 2
(b)
(c) 4
(d) /2

• Product of time period and frequency of a vibrating system is equal to

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

• Unit of coefficient of viscosity is

(a) Kgms^-1
(b) Kgms^-2
(c) Kgms²s^-1
(d) Kgms^-1s^-1

• Super position of two identical waves travelling in opposite direction give rise to

(a) Progressive waves
(b) Stationary waves
(c) Travelling waves
(d) Electromagnetic waves

• Critical angle is the angle of incidence for which angle of refraction becomes

(a) 90
(b) 60
(c) 45
(d) 30

• A heat engine have 50% efficiency. The ration between source and sink temperature =-----

(a) 1
(b) 0.5
(c) 1.5
(d) 2.0

• A star moving away from the earth shows

(a) Blue Shift
(b) Red Shift
(c) Yellow shift
(d) Violet Shift

• A diesel engine have ----------spark plugs

(a)1
(b) 2
(c) 3
(d) No

• In young’s double slit experiment, fringe spacing -------

(a) λL/d
(b) λLd
(c) d/λL
(d) 1/λLd

Inter (Part-I) Bahawalpur 2016
Physics 
Part I (Subjective Type)
Time Allowed: 3.10 Hours 
Max. Marks: 83

It is compulsory to attempt any (06) part from Q.No.02 and attempt any (8-8) part each from Q.No.03 and Q.No.04 and attempt any (03) question from Part-II while attempt Part III (Practical Part) according to the given instructions

Write same question No. and its part No as given in the question paper (22 x 2=44)

Part-I

Question #2

• Describe briefly for the conditions the interference of light waves.
• How would you distinguish between unpolarized and plane polarized light?
• How would you manage to get more orders of spectra using diffraction grating?
• What is Simple Microscope? Give relation for its magnification?
• Why would it be ads advantageous to use blur light will, compound microscope?
• Why the average velocity of the molecules in a gas zeros and the average of the square of velocities is not zero?
• Is it possible to convert internal enemy into mechanical energy? Explain with an example.
• Define Pressure of Gas.0300 its formula.
• Define Isothermal Process and Adiabatic Process.

Question #3

• Show that P=
• Prove that 1 radian = 57.3°
• Find Rotational Kinetic Energy ho a disc.
• Show that the orbital angular momentum L₀=mrv
• An object has 1 joule of potential energy. Explain what does it mean?
• What sort of energy is in the given: (i)A moving car (iii) A compressed spring
• Does frequency depend on amplitude for Harmonic Oscillators?
• What happens in the period of a simple pendulum if its length and mass suspended are doubled?
• Can we realize an ideal simple Pendulum? Explain.
• Write any two important loon of Superposition of Waves?
• Explain why Sound travel faster In Warm Air than in Cold Air?
• How should a sound source move with respect to an observer so that the frequency of its sound does not change?

Question #4

• Differentiate between Precision and Accuracy.
• Define Viscosity and give its unit.
• Check the correctness of relation v=  where v Is speed of transverse wave on a stretched string of tension F, length 1 and mass m.
• Give drawbacks to use the period of a pendulum as a time standard.
• A light year is the distance light travels in one year. How many meters are there in one light year.( Speed of light = 3.010⁸ ms^-1)
• In which quadrant vector lies if:
  (a) Both of its components have same signs
  (b) Its components have different signs.
• Can the magnitude of a vector have a negative value Explain.
• Name two different conditions that could make
• A ball is thrown with a speed of 30ms^-1 In a Maeda 30° ahem the horizon, and the time of light.
• Can the velocity of an object reverse the direction when acceleration is constant? If so give an example.
• Define instantaneous Velocity and Instantaneous Acceleration.
• xii. Differentiate between Elastic and Inelastic Collision.

Part- II

Question #5
(a) What Is Astronomical Telescope? Discuss its working and calculate its magnifying power. (5)
(b) A monochromatic light of λ=588 nm is allowed to fall on the half silvered glass pine G₁ in the Michelson interferometer if mirror M₁ is moved through 0. 2.33mm how many fringes will be observed to shift? (3)

Question #6
(a)What is Simple Pendulum? Show that it perform simple Harmonic Motion. Hence derive formula for its lime Period. (5)
(b)Find the temperature at which the velocity of mind in air Ls two times its velocity at 10°C . (3)

Question #7
(a)What is Carnot Engine? Discuss Carnet's Cycle. Derive an expression for its efficiency. (5)
(b)Water flows through a hose, whose internal diameter is 1 cm at a speed of 1ms^-1.What should be diameter of nozzle if the water is emerge at 21m^-1. (3)

Question #8
(a) Define Absolute PE, and derive a relation for absolute Gravitational Potential Energy. (5)
(b) A 100 Kg car travelling with a speed of 114 Kmh^-1 round a curve of radius 100 m. Find the necessary Centripetal Force. (3)

Question #9
(a) Explain the addition of two vectors  and   and by rectangular component methods.(5)
(b) A truck weighing 2500kg and moving with a velocity of 21ms^-1 I collides with stationary weighing100Kg. The truck and the car move together after the impact Caudate their common velocity. (3)

Part III (Practical Part)

Give answers to any four questions/parts (4x2=8)

Question #10
(i) What is Zero Correction?
(ii) what is meant by least Count?
(iii) Define Resultant Vector.
(iv) What is the value of “g” at the centre of Earth?
(v) Define Centre of Gravity.
(vi)What is Meant by Index Correction?
(vii)What IS Optical Centre of a lens?
(viii) What is meant by Elastic Limit?