PHYSICS TEST

11th CLASS

                        PAPER Fsc PART 1(FULL BOOK)

SUBJECTIVE PART                                                                                TIME: 3:10 hours

Write answer of any EIGHT questions.                                                         (8*2=16)

         i.            What do you know about international system of units? Describe its significance?

        ii.            What types of errors are possible in measuring the time period of pendulum by stop watch?

      iii.            Write down the dimensions of velocity, acceleration and force?

      iv.            Give the drawbacks to use the period of a pendulum as a time standard?

       v.            Discuss the different cases of multiplication of a vector by a scalar (number).

      vi.            State the complete requirement for a body to be in equilibrium?

    vii.            Can you add zero to a null vector?

   viii.            Describe the Newton’s second law of motion in terms of momentum.

      ix.            Show that impulse of a force is equal to the change in linear momentum.

       x.            Motion with constant velocity is a special case of motion with constant acceleration. Is this statement is true? Discuss

      xi.            Differentiate among the elastic and inelastic collision.

    xii.            A person is standing near a fast moving train. Is there any danger that he will fall towards it?

Write answer of any EIGHT questions.                         .                                  (8*2=16)

         i.            A girl drops a cup from a certain height, which breaks into pieces. What energy changes are involved?

        ii.            An object has 1 J of potential energy. Explain what does it mean?

      iii.            Define the term energy. Describe the different types of mechanical energy?

      iv.             Why a diver does changes its body position before and after diving in the pool?

       v.            When mud flies off the tyre of a moving bicycle, in what direction does it fly? Explain.

      vi.            What do you know about INTELSAT’s communication system?

    vii.            Can we realize an ideal simple pendulum?

   viii.            Describe some common phenomenon in which resonance plays an important role.

      ix.            Differentiate among free and forced oscillations.

       x.             How are the beats useful in tuning musical instruments?

      xi.             Why should sound travel faster in solids than in gases?

    xii.            What are the stationary waves? Describe the main characteristics of stationary waves.

Write answer of any SIX questions.                                                                   (6*2=12)

         i.            Can visible light produced interference fringes? Explain

        ii.            Why the Polaroid sunglasses are better than ordinary sunglasses?

      iii.            What is the importance o X-ray diffraction?

      iv.            Why would it be advantageous to use blue light with a compound microscope?

       v.            How the power is lost in optical fiber through dispersion? Explain

      vi.            Is it possible to construct a heat engine that will not expel heat into the atmosphere?

    vii.            Does entropy of a system increase or decrease due to friction?

   viii.            Give an example of a natural process that involves an increase in entropy?

      ix.            Differentiate between reversible and irreversible reaction?   

SECTION 2                                                                                   

Attempt any three question.                                                                             (3*8=24)

Q#01: (a) Define rectangular component of a vector. How two can be added by rectangular component method?

            (b) Find the angle of projection of projectile for which its maximum height and horizontal range are equal?

Q#02:    (a) Drive relation for the kinetic energy of a disc and a hoop?

             (b)An electron strikes the screen of a cathode ray tube with a velocity of 1.0*10⁷ m/s. Calculate its kinetic             energy. The mass of an electron is 9.1*10^-31 kg.

Q#03: (a) What is the effect of variation of pressure, density and temperature on the speed of sound in a gas?

           (b) A simple pendulum s 50 cm long .what will be its frequency of vibration at a place where g=9.8 ms^-2.

Q#04: (a) Define astronomical telescope. Write its construction and magnifying power with the help of ray diagram.

           (b)In a double slit experiment the second order maximum occur at Ф=0.25⁰. The wavelength is 650 nm.                  Determine the slit separation.

Q#05: (a) Drive the relation C_p –C_v=R.

           (b) What gauge pressure is required in the city mains for a stream from a fire house connected to the mains to reach a vertical height of 15m.

Practical:

Q#01: Write down the procedure to determine experimentally time period of a simple pendulum is independent of its mass.                                                                OR

  Write down the procedure To find the refractive index of a liquid using a concave mirror.

Graph paper

         i.            What can you concluded from the graph?

        ii.            Find the slope of the graph?

      iii.            What is the acceleration when time is 6sec?