1st Year Physics Chapter 5 Circular Motion MCQs with Answers

Get the 1st Year Physics Chapter 5 Circular Motion MCQs with Answers here online. In this chapter, the Circular or Angular motion of a body is described. The motions are in the form of Angular Displacement, Angular Velocity, Angular Acceleration. What is the relation b/w Angular and Linear Velocities is also described. The force needed to move a body in a circular path is the Centripetal Force. Moment of  Inertia, Angular Momentum, Artificial Satellite, Real and Apparent Weight, and Orbital Velocity also works on the principle of Circular motion. It also includes Artificial Gravity, Geostationary Orbits, and Communication Satellite. Newton and Einstein gave different views about Gravitation. So, this is the information about this chapter. Get the important MCQs below.

1st Year Physics Chapter 5 Circular Motion MCQs with Answers

1st Year Physics Chapter 5 Circular Motion MCQs with Answers

KEY POINTS

  • Angular Displacement, Velocity, and Acceleration
  • Relation b/w Angular and Linear Velocities
  • Centripetal Force
  • Moment of Inertia
  • Angular Momentum
  • Rotational Kinetic Energy
  • Artificial Satellite
  • Real and Apparent Weight
  • Orbital Velocity
  • Artificial Gravity
  • Geostationary Orbits
  • Communication Satellite
  • Newton’s and Einstein’s views of Gravitation

 

Question#1. The rotational K.E of the hoop is?

  • Equal to its translational K.E
  • Half than its translational K.E
  • Double than its translational K.E
  • Four times than its translational K.E

Answer

Answer

Equal to its translational K.E

Question#2. A hoop and disc have the same mass and radius. Their rotational K.E is related by an equation?

  • K.Ehoop = K.Edisc
  • K.Ehoop = 2K.Edisc
  • K.Ehoop = 1/2K.Edisc
  • K.Ehoop = 4K.Edisc

Answer

Answer

K.Ehoop = 2K.Edisc

Question#3. The angular velocity of a minute hand of a clock is?

  • 2 π/60 rads-1
  • π/24 rads-1
  • 2 π/3600 rads-1
  • π/3600 rads-1

Answer

Answer

2 π/3600 rads-1

Question#4. The angular K.E of a body is independent of?

  • Speed
  • Moment of inertia
  • Angular momentum
  • None of these

Answer

Answer

None of these

Question#5. A body suddenly comes and sits on the circular rotating table. What will remain conserved?

  • Angular momentum
  • Linear velocity
  • Kinetic energy
  • None of these

Answer

Answer

Angular momentum

Question#6. According to Einstein, the gravitational interaction is possible between?

  • Material objects only
  • Material objects and electromagnetic radiation only
  • Electromagnetic radiations
  • None of the above

Answer

Answer

Material objects and electromagnetic radiation only

Question#7. The number of revolutions in 3π radians?

  • 2
  • 3/2
  • 6
  • 1/60

Answer

Answer

3/2

Question#8. The period of circular motion is given by:

  • T = rV
  • T  = ωw
  • T = 2πω
  • T = 2π/ω

Answer

Answer

T = 2π/ω

Question#9. The direction of linear velocity of a body moving in a circle is?

  • Along the axis of rotation
  • Along the tangent
  • Directed towards the center
  • Directed away from the center

Answer

Answer

Along the tangent

Question#10. When a body moves in a circle, the angle between its linear velocity and angular velocity is always?

  • 180°
  • 90°
  • 45°

Answer

Answer

90°

Question#11. An arc of length equal to the circumference of a circle subtends an angle?

  • π radian
  • 2π radian
  • π/2 radian
  • 4π radian

Answer

Answer

2π radian

Question#12. The relation between linear and angular acceleration is:

  • α = axrv
  • a = rxα
  • a = α x r
  • r = αxa

Answer

Answer

a = α x r

Question#13. When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by?

  • Mass of body
  • Velocity of body
  • Tension in the string
  • Centripetal acceleration

Answer

Answer

Tension in the string

Question#14. What remains constant when the earth revolves around the sun?

  • Linear momentum
  • Linear K.E
  • Angular K.E
  • Angular momentum

Answer

Answer

Angular momentum

Question#15. The angular momentum of a body is conserved if?

  • Force acting on its constant
  • Force acting on it is zero
  • The torque acting on it is zero
  • All of these

Answer

Answer

The torque acting on it is zero

Question#16. A stone is whirled in a vertical circle at the end of the string. When the stone is at the highest position the tension in the string is?

  • Maximum
  • Zero
  • Equal to the weight of the stone
  • Less than the weight of the stone

Answer

Answer

Equal to the weight of the stone

Question#17. The “clutch” of a car works by using which type of collision?

  • Torsional collision
  • Rotational collision
  • Scattering of piston
  • None of these

Answer

Answer

Rotational collision

Question#18. In the case of planets, the necessary acceleration is provided?

  • Gravitational force
  • Frictional force
  • Coulomb force
  • Centripetal force

Answer

Answer

Gravitational force

Question#19. If a car moves with a uniform speed of 2ms-1 in a circle of radius 0.4. Its angular speed is?

  • 4 rad. S-1
  • 5 rad. S-1
  • 1.6 rad. S-1
  • 2.8 rad. S-1

Answer

Answer

5 rad. S-1

Question#20. A body can have constant velocity when it follows an:

  • Elliptical path
  • Circular path
  • Parabolic path
  • Rectilinear path

Answer

Answer

Rectilinear path

Question#21. A body moving along the circumference of a circle, completes two revolutions. If the radius of the circular path is R, the total angular displacement covered is?

  • πR
  • 2Πr
  • Zero

Answer

Answer

Question#22. The angular speed for the daily rotation of Earth in rad s-1 is?

  • π
  • 7.3 x 10-5 rads-1

Answer

Answer

7.3 x 10-5 rads-1

Question#23. Time taken by geostationary satellite to complete one rotation around Earth is?

  • 1 year
  • 1 day
  • 1 hour
  • 84 min

Answer

Answer

1 day

Question#24. The direction of angular momentum is along?

  • Tangent to the circle
  • Inward the radius
  • Axis of rotation
  • Outward of the radius

Answer

Answer

Axis of rotation

Question#25. If a wheel of radius r turns through an angle of 30°, then the distance through which any point on its rim moves is?

  • π/3 r
  • π/6  r
  • π/30 r
  • π/180 r

Answer

Answer

π/6  r

Question#26. In angular motion, Newton’s second law of motion is:

  • F = ma
  • F = ∆p/∆t
  • t = 1α
  • All of the above

Answer

Answer

t = 1α

Question#27. The angular speed of the second’s hand of a watch in rads-1 is?

  • π
  • π/2
  • π/30
  • π/180

Answer

Answer

π/30

Question#28. The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is?

  • π
  • 12π

Answer

Answer

12π

Question#29. What is an outward force acting on a mass of 10kg when rotating at one end of an inelastic string 10m long at speed of 1m/s?

  • 1N
  • 10N
  • 2N
  • 100N

Answer

Answer

1N

Question#30. If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is?

  • At the highest point
  • At the lowest point
  • At any point during motion
  • At the point where gravity is not acting

Answer

Answer

At the lowest point

Question#31. The global positioning system consists of how many satellites?

  • 24 Natural satellites
  • 24 artificial satellites
  • 3 synchronous satellites
  • Both b and c

Answer

Answer

24 artificial satellites

Question#32. A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is?

  • mg
  • mg – ma
  • mg + ma
  • ma – mg

Answer

Answer

mg + ma

Question#33. Who discovered the inverse square law of gravity?

  • Einstein
  • Galileo
  • Newton
  • Plank

Answer

Answer

Newton

Question#34. Bruce Mc. Candles stepped into space from a space shuttle in 1984 at a speed of?

  • 2900 km h-1
  • 29000 km h-1
  • 29000 ms-1
  • 2900  ms-1

Answer

Answer

29000 kmh-1

Question#35. A satellite moving round the earth constitutes?

  • An inertial frame of reference
  • Non-inertial frame
  • Neither inertial nor non-inertial
  • Both inertial and non-inertial

Answer

Answer

Non inertial frame

Question#36. A body of mass 10kg is rotating in a circular path of radius ‘r’ m with constant speed. The work done in one complete revolution is?

  • 10.3 rads-1
  • Zero
  • 100 rads-1
  • 0.5 rads-1

Answer

Answer

Zero

Question#37. A body of 2kg is suspended from the ceiling of an elevator moving up with an acceleration g. Its apparent weight in the elevator will be?

  • 9.8N
  • 19.6N
  • 129.4N
  • 39.2N

Answer

Answer

39.2N

Question#38. Moment of inertia of which body about its perpendicular axis is greater, (all have the same mass and radius)?

  • Sphere
  • Hoop
  • Disc
  • All have the same movement of inertia

Answer

Answer

Hoop

Question#39. If θE is the angle of bending of light predicted by Einstein’s theory of gravity and θN that by Newton’s then?

  • θE = θN
  • θE = 1/2 θN
  • θE = 2θN
  • No relation exists between θE and θN

Answer

Answer

θE = 2θN

Question#40. In the solar eclipse of 1919 A.D., bending of straight light was measured to be?

  • 1.745 degree
  • 1.745 minute
  • 1.745 seconds
  • 1.745 radian

Answer

Answer

1.745 seconds

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