sample paper physics class XI

 

CANTT PUBLIC HIGH SCHOOL & BOYS COLLEGE

                            WAHDAT COLONY TAXILA

1^st Assessment March 2021

 

Name: _______________________________________

Class: XI                          Paper: Physics               Time:  20   Minutes                      Marks: (1✕10 = 10)

 

SECTION –A

 

Note: Section-A is compulsory. Deleting and overwriting is not allowed. Do not use lead pencil.

Q1.Encircle the correct options i.e. A, B, C, D. All parts carry equal marks.

        i.            The angle made by ice cobne at its edge is a…….. angle.

A.        Plane                B.        Solid                C.        Critical             D.        Abtuse

      ii.            10^-9 is called?

A.    micro                    B.        giga                  C.    femto                    D.        nano

3. The dimensions of force are

A.        [MLT^-1]            B.        [MLT^-2]            C.        [MLT^-4]            D.        [MLT^-3]

4. If the body is at rest or rotating with uniform angular velocity, then torque will be?

A.        Maximum         B.        Negative           C.        Zero                 D.        Minimum

      v.            A body will be in translational equilibrium if

 A.       ∑T = 0             B.        ∑F = 0             C.        ∑p = 0             D.        ∑Fx = 0

    vi.            If dot product is zero then angle between vector A and B is?

A.        30⁰                   B.        45⁰                   C.        60⁰                   D.        90⁰

  vii.             The rate of change in momentum of a body is equal to

A.        Displacement    B.        Velocity            C.        Acceleration     D.        Applied Force

viii.            Name the quantity which is not vector?

A.        Force              B.        Power              C.        Velocity            D.        Displacement

9. The unit of impulse is

 A.       Newton            B.        JS                    C.        NS                   D.        Nm

10. Absolute P.E of an object at an infinite height with respect to earth is taken as

A.        Negative           B.        Zero                 C.        Minimum          D.        Virtual

 

 

 

For Examiner’s Use Only                                                                      Q.No.1 Total Marks:

                                                                                                            Marks Obtained:

 

 

 

Class: XI                          Paper: Physics                            Time:  2 h 10 Minutes                      Marks: 40

 

Section – B (Marks 12)

 

Q.2 Attempt any FOUR parts from the following. All parts carry equal marks.                (4x3=12)

        i.            What is the difference between radian and steradian?

      ii.            Write down the dimensions of work and energy?

    iii.            Prove that the Newton’s 2^nd law is dimensionally correct?                  

    iv.            Prove that 1 rad = 57.3⁰?

      v.            Prove that the vector product of two vectors is not commutative.

    vi.            When you stand still on the ground, how large a force does the ground exert on you? Why does not this force make you rise up into the air?

Section - C (Marks 12)

 

Q.3 Attempt any FOUR parts from the following. All parts carry equal marks.                (4x3=12)

     i.                  When you release an inflated but untied balloon, why does it fly across the room?        

   ii.                  Is K.E a vector quantity?

 iii.                  A man rowing boat upstream is at rest with respect to shore, is he doing work?  ?                   

 iv.                  What type of energy is stored in the spring of watch?

   v.                  Why is the fly wheel of an engine made heavy in the rim?

 vi.               Prove that v = rw and a = rα.

Section - D (Marks 16)

Note: Attempt any TWO questions.                                                                                     (08x2=16)

Q4.      (a) Derive a complete formula for absolute P.E                                                 (5)

             (b) Find an expression for the time ‘T’ of a simple pendulum. The time period T may depends upon       (i) mass ‘m’ (ii) length ‘l’ (iii) acceleration ‘g”                                                            (3)

Q5.       (a) Find and expression for find the Range of a Projectile.                                             (5)

             (b) What is torque? On which factors it depends?                                                         (3)

Q6.       (a) Derive and expression for escape velocity?                                                 (5)

             (b) Explain all conditions for equilibrium.                                                                       (3)

 

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