**Class 11 Physics** BSEH Solution for all **Chapters Important MCQ** Question Answer for Haryana board. CCL Chapter Provide Class 1th to 12th all Subjects Solution With Notes, Question Answer, Summary and Important Questions.

**Also Read – HBSE Class 11 Imporant Questions in Videos 2023**

HBSE Class 11 Physics Important MCQ Question Answer / grade 11 physics multiple choice questions / class 11 physics objective questions of all chapters Solution.

**HBSE Class 11 Physics MCQ Important Questions With Answer 2023**

**1. Three balls projected upwards with the same initial speed at angle θ = 30°, 45° and 60° respectively. Let the range of the ball be expressed by R _{θ}. Then :**

(a) R

_{30}> R

_{45}> R

_{60}

(b) R

_{60}> R

_{45}> R

_{30}

(c) R

_{45}> R

_{30}

(d) R

_{45}< R

_{60}

**Answer**

**Ans – (c) R _{45} > R_{30}**

**2. The following particles are moving with the same velocity. The particle with maximum momentum is : Most Important**

(a) β-particle

(b) Proton

(c) α particle

(d) Neutron

**Answer**

**Ans – (c) α particle**

**3. In Elastic Collision:**

(a) Both momentum and K.E. are conserved

(b) Both momentum and K.E. are not conserved

(c) Momentum is conserved and K.E. is not conserved

(d) Momentum is not conserved and K.E. is conserved

**Answer**

**Ans – (a) Both momentum and K.E. are conserved**

**4. In perfect inelastic collision : Most Important**

(a) both momentum and K.E. are conserved

(b) both momentum and K.E. are not conserved

(c) momentum is conserved and K.E. is not conserved

(d) momentum is not conserved and K.E. is conserved

**Answer**

**Ans – (c) momentum is conserved and K.E. is not conserved**

**5. In an elastic collision of two bodies, which of the following physical quantities are conserved ?**

(a) Kinetic Energy only

(b) Momentum only

(c) Both Kinetic Energy and Momentum

(d) None of the above

**Answer**

**Ans – (c) Both Kinetic Energy and Momentum**

**6. When the momentum of body is increased by three times, its K.E. becomes : Most Important**

(a) Twice

(b) Half

(c) Four times

(d) Nine times

**Answer**

**Ans – (d) Nine times**

**7. Two objects A and B of masses 5 kg and 10 kg respectively are moving with same velocity. The ratio of their momentum will be : Most Important**

(a) 1 : 1

(b) 1 : 5

(c) 10 : 5

(d) 1 : 2

**Answer**

**Ans – (b) 1 : 5**

**8. Two objects A and B of masses 2 kg and 10 kg respectively are moving with same velocity. The ratio of their momentum will be: Most Important**

(A) 1:1

(B) 1:5

(C) 5:1

(D) 1:25

**Answer**

**Ans – (B) 1:5**

**9. 1 Kilowatt-hour is equivalent to :**

(a) 10^{-7} Joule

(b) 1.6 x 10^{-19} Joule

(c) 4.186 Joule

(d) 3.6 x 10^{6} Joule

**Answer**

**Ans – (d) 3.6 x 10 ^{6} Joule**

**10. Kepler third law related to the planetary motion is:**

(a) T α r

(b) T α r^{2}

(c) T α r^{3}

(d) T α r^{3/2}

**Answer**

**Ans – (d) T α r ^{3/2}**

**11. Pick out the only vector quantity in the following list:**

(a) Temperature

(b) Impulse

(c) Current

(d) Charge

**Answer**

**Ans – (b) Impulse**

**12. Which of the following is scalar quantity?**

(A) Distance

(B) Displacement

(C) Force

(D) Acceleration

**Answer**

**Ans – (A) Distance**

**13. Which of the following is scalar quantity?**

(a) Displacement

(b) Velocity

(c) Work

(d) Force

**Answer**

**Ans – (c) Work**

**14. One end of a string of length L is connected to a particle of mass m and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed v the net force on the particle (directed towards the centre) is:**

**T is the tension in the string. Choose correct alternative.**

(a) T

(b) T – mv²/L

(c) T + mv²/L

(d) 0

**Answer**

**Ans – (a) T**

**15. A body is initially at rest. It undergoes one dimensional motion with constant acceleration. The power delivered to it at time t is proportional to:**

(a) t^{1/2}

(b) t^{3/2}

(c) t

(d) t²

**Answer**

**Ans – (c) t**

**16. A body is moving unidirectionally under the influence of a source of constant power. Its displacement in time t is proportional to :**

(a) t^{1/2}

(b) t

(c) t^{3/2}

(d) t²

**Answer**

**Ans – (c) t ^{3/2}**

**17. In considering motion of an object under the gravitational influence of another object which of the following quantity is conserved :**

(a) Angular momentum

(b) Linear momentum

(c) Potential Energy

(d) Kinetic Energy

**Answer**

**Ans – (a) Angular momentum**

**18. A body enters in the gravitational field of the earth from external atmosphere. The potential energy of the earth body system : Most Important**

(a) will increase

(b) will decrease

(c) will remain unchanged

(d) none of the above

**Answer**

**Ans – (b) will decrease**

**19. Choose the correct alternative: Most Important**

(a) Acceleration due to gravity increases with increasing altitude.

(b) Acceleration due to gravity increases with increasing depth (assume the earth to be a sphere of uniform density.)

(c) Acceleration due to gravity dependent on mass of the body.

(d) The formula GMm( 1/r_{2} – 1/r_{1} ) is more accurate than the formula mg(r_{2}–r_{1}) for the difference of potential energy between two points r_{2} and r_{1 }distance away from the centre of the earth.

**Answer**

**Ans – (d) The formula GMm( 1/r _{2} – 1/r_{1} ) is more accurate than the formula mg(r_{2}–r_{1}) for the difference of potential energy between two points r_{2} and r_{1 }distance away from the centre of the earth.**

**20. Does the escape speed of a body from the earth depend on :**

(a) the mass of the body

(b) the location from where it is projected

(c) the direction of projection

(d) the height of the location from where the body is launched

**Answer**

**Ans – (d) the height of the location from where the body is launched**

**21. Which of the following elastic constants is dimensionless ?**

(a) Young’s modulus

(b) Poisson Ratio

(c) Bulk modulus

(d) Shear modulus

**Answer**

**Ans – (b) Poisson Ratio**

**22. In which of the following thermodynamics process no heat flow between the system and surroundings ?**

(a) Adiabatic

(b) Isothermal

(c) Isobaric

(d) Isochoric

**Answer**

**Ans – (a) Adiabatic**

**23. At what condition real gas approach ideal gas behaviour?**

(a) Low pressure and low temperature

(b) Low pressure and high temperature

(c) High pressure and high temperature

(d) High pressure and low temperature

**Answer**

**Ans – (b) Low pressure and high temperature**

**24. According to kinetic theory of gases, pressure exerted by Ideal gas is equal to :**

**(ρ-density, v- Root mean square speed)**

(a) 1/3 ρv²

(b) 1/2 ρv²

(c) ρv²

(d) 3/2 ρv²

**Answer**

**Ans – (d) 3/2 ρv²**

**25. Two forces of 5 Newton each act at a point inclined at 120° with each other. The magnitude of vector addition of these forces is:**

(a) Zero

(b) 5 Newton

(c) 5√3 Newton

(d) 10 Newton

**Answer**

**Ans – (b) 5 Newton**

**26. A force of 98 N is just able to move a block of mass 20 kg on a rough horizontal surface. Coefficient of friction is (g = 9.8 m/sec ^{2}) :**

(a) .4

(b) .5

(c) .6

(d) Zero

**Answer**

**Ans – (b) .5**

**27. Unit of Moment of Inertia in S. I. system is :**

(a) kg/meter²

(b) kg-meter²

(c) kg-meter

(d) kg-meter/sec²

**Answer**

**Ans – (b) kg-meter²**

**28. The time of revolution around the earth of Communication Satellite INSAT-11B is:**

(a) 12 hours

(b) 24 hours

(c) 48 hours

(d) 30 days

**Answer**

**Ans – (b) 24 hours**

**29. A particle completes semicircular path of radius r. The ratio of distance travelled and displacement of particle will be: Most Important**

(a) π/2

(b) π/4

(c) 3π/4

(d) π

**Answer**

**Ans – (a) π/2**

**30. A particle completes semicircular path of radius r, displacement travelled by particle will be :**

(a) r/4

(b) r/2

(c) 2r

(d) 4r

**Answer**

**Ans – (c) 2r**

**31. The product of moment of inertia and angular acceleration is called:**

(a) Angular momentum

(b) Torque

(c) Force

(d) Work

**Answer**

**Ans – (b) Torque**

**32. If mass M and radius of solid sphere is R, then moment of inertia about diameter is : Most Important**

(a) 2/3 MR²

(b) 2/5 MR²

(c) 3/5 MR²

(d) 7/5 MR²

**Answer**

**Ans – (b) 2/5 MR²**

**33. The weight of a body at the centre of the earth is :**

(a) Zero

(b) Infinite

(c) Slightly less than at the poles

(d) Slightly less than at the equator

**Answer**

**Ans – (a) Zero**

**34. Which of the following is not unit of energy?**

(a) Joule

(b) Calorie

(c) Electron-volt

(d) Kilo-watt

**Answer**

**Ans – (d) Kilo-watt**

**35. Which of the following is Fundamental Unit?**

(a) Watt

(b) Newton

(c) Ampere

(d) Joule

**Answer**

**Ans – (c) Ampere**

**36. Which of the following is not Fundamental Unit?**

(A) Ampere

(B) Second

(C) Mole

(D) Watt

**Answer**

**Ans – (D) Watt**

**37. There is an error of 3% in the measurement of side of a cube. The percentage error in the calculation of its volume of the sphere will be : Most Important**

(a) 9%

(b) 6%

(c) 3%

(d) 1%

**Answer**

**Ans – (a) 9%**

**38. There is an error of 2% in the measurement of side of a cube. The percentage error in the calculation of its volume of the sphere will be : Most Important**

(A) 1%

(B) 2%

(C) 3%

(D) 6%

**Answer**

**Ans – (D) 6%**

**39. The dimensional formula [MLT ^{-2}] represent :**

(a) Force

(b) Torque

(c) Power

(d) Momentum

**Answer**

**Ans – (a) Force**

**40. The dimensional formula (MLT ^{-1}) represents :**

(A) Force

(B) Torque

(C) Power

(D) Momentum

**Answer**

**Ans – (D) Momentum**

**41. Which friction is minimum?**

(a) Static Friction

(b) Limiting Friction

(c) Kinetic Friction

(d) None

**Answer**

**Ans – (c) Kinetic Friction**

**42. Which friction is maximum ?**

(A) Static Friction

(B) Limiting Friction.

(C) Kinetic Friction

(D) None

**Answer**

**Ans – (B) Limiting Friction.**

**43. Gravitational force is :**

(a) a conservative force

(b) Pseudo force

(c) a non-conservative force

(d) None of the above

**Answer**

**Ans – (a) a conservative force**

**44. Friction force is:**

(A) a conservative force

(B) pseudo force

(C) a non-conservative force

(D) centripetal force

**Answer**

**Ans – (C) a non-conservative force**

**45. The linear acceleration a of a body rotating about an Axis with angular acceleration ∝ then :**

(a) a = rω

(b) ∝ = ar

(c) a = r∝

(d) r = a∝

**Answer**

**Ans – (c) a = r∝**

**46. The potential energy of a particle in SHM at a distance x from the equilibrium position is :**

(a) 1/2 mw²x²

(b) 1/2 mw²a²

(c) 1/2 mw²(a²-x²)

(d) Zero

**Answer**

**Ans – (a) 1/2 mw²x²**

**47. If a process takes place in a system at a constant pressure, the process is known as :**

(a) Isochloric

(b) Isothermal

(c) Adiabatic

(d) Isobars

**Answer**

**Ans – (d) Isobars**

**48. A body of mass m is moving on a circle of radius r with uniform speed v. The centripetal force on body is : Most Important**

(a) mv²/r

(b) mvr

(c) mv/r

(d) mv/r²

**Answer**

**Ans – (a) mv²/r**

**49. The mean kinetic energy of a molecule of any gas at absolute temperature T is proportional to : Most Important**

(a) 1/T

(b) √T

(c) T

(d) T²

**Answer**

**Ans – (c) T**

**50. The value of Young’s modulus of elasticity for a perfectly rigid body is : Most Important**

(a) Zero

(b) Infinite

(c) 1

(d) 100

**Answer**

**Ans – (b) Infinite**

**51. The distance travelled by a particle is directly proportional to the square of the time taken, the acceleration of the particle is :**

(A) Increasing

(B) Decreasing

(C) Zero

(D) Constant

**Answer**

**Ans – (D) Constant**

**52. The linear velocity υ of a body rotating about an axis with angular velocity ω, then :**

(A) υ = rα

(C) υ = rω

(B) ω = υr

(D) r = υω

**Answer**

**Ans – (C) υ = rω**

**53. If a process takes place in a system at a constant volume, the process is known as:**

(A) Isochoric

(B) Isothermal

(C) Adiabatic

(D) Isobaric

**Answer**

**Ans – (A) Isochoric**

**54. The time period of a particle executing simple harmonic motion is:**

(A) T = 2π √Displacement/Acceleration

(B) T = 2π √g/Displacement

(C) T = 2π √velocity/Displacement

(D) T = 2π √g x Displacement

**Answer**

**Ans – (A) T = 2π √Displacement/Acceleration**

**55. An object is moving with the constant acceleration. Its velocity time graph is :**

**Answer**

**Ans – (A)**