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Applied physics - I Question paper 2021 (Even) | SBTE Bihar


1. Unit of inertia


  • Centimeter
  • Kg
  • [ML²]
  • None of these

2. Dimension of constant term.

  • [M⁰L⁰T⁰]
  • [ML-¹T-¹]
  • [ML²]
  • None of these

3. Vector quantity has

  • Magnitude only
  • Direction only
  • Magnitude as well as direction both
  • None of these

4. Definition of force comes out from

  • First law of motion
  • Second law of motion
  • Third law of motion
  • 0th law of thermodynamics


5. The Formula of impulse is ;

  • Force * small interval of time
  • Mass * Force
  • Mass * small interval of time
  • None of them

6. Which is the correct relation

  • v = w/r
  • w = v/r
  • r = v.w
  • None of them

7. When a body moves on a circular path the value of centrifugal acceleration is

  • a = v²/r
  • a = v².r
  • a = r/v²
  • None of these

8. A body moves on a circular path from a fixed point and after completion of a circle reach the same point then work done is : 

  • Maximum
  • Minimum
  • Zero
  • None of these

9. Lubricants

  • Increases the friction
  • Decreases the friction
  • Neither increases nor decreases the friction.
  • None of these

10. The formula of power is

  • P = Force * Velocity
  • Power = Work done * Time
  • P = Work done * Energy
  • P = Force * Energy

11. A body of mass 'm' moving with velocity 'v' then kinetic energy of the body is :

  • K.E = 2mv²
  • K.E = v² / 2m
  • K.E = 1/2 mv²
  • K.E = m²/2v

12. In absence of external cause the total energy of the system is :

  1. Variable
  2. Constant
  3. 1 and 2 both are true
  4. Neither 1 nor 2 is true

13. Torque () is


Ans. (b) 

14. Moment of inertia of a ring about an axis passing through its centre and perpendicular to its plane is : 

  • 1/2 MR²
  • 2MR²
  • MR²
  • (2/5) MR²

15. If THE RADIUS OF OF GYRATION INCREASES THE ANGULAR VELOCITY OF THE free revolving system

  • Decreases
  • Increases
  • Remains the same
  • None of these

16. Strain is

  1. Change in length per unit original length
  2. Change in volume per unit original volume.
  3. 1 and 2 both
  4. Neither 1 nor 2

17. Pressure is

  • Force * Area
  • Area / Force
  • Force / Area
  • Force * Displacement

18. Cohesive force is greater

  • Mercury (Hg)
  • Water
  • K - oil
  • None of these

19. In conduction heat transmitted by the process

  • Displacement of the particle of medium
  • Particle remains the same place and heat energy transmitted.
  • Needs no media to propagate it.
  • None of them

20. Specific heat capacity is greater for

  • Air
  • Wood
  • Iron
  • Water

Applied Physics - I question Paper 2021


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