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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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