MCQOPTIONS
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MCQOPTIONS
This section includes 78 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
In translatory motion, the axes of the frame of reference of the object remains always parallel to the corresponding axes of? |
| A. | mover's frame of reference. |
| B. | rotator's frame of reference. |
| C. | None of these. |
| D. | observer's frame of reference. |
| Answer» E. | |
| 52. |
The point of intersection of the lines of action of the weight of all the points of body is called? |
| A. | centre of gravity of the body |
| B. | None of these |
| C. | Centre of mass of the body |
| D. | centre of the body |
| Answer» B. None of these | |
| 53. |
If the axis of rotation does not pass through the body the rotatory motion is said to be? |
| A. | Oscillatory motion. |
| B. | Circular motion. |
| C. | Orbital motion. |
| D. | Spin motion. |
| Answer» D. Spin motion. | |
| 54. |
A body (a rigid body) is said to possess a purely rotatory motion if every constituent particle of the body moves in a circle, the centre of which are on a straight line called? |
| A. | The fixed line. |
| B. | The line of rotation. |
| C. | The axis of rotation. |
| D. | The spinning rod. |
| Answer» D. The spinning rod. | |
| 55. |
The motion of the train and the car belongs to the? |
| A. | Rotatory motion. |
| B. | Translatory motion. |
| C. | To and fro motion. |
| D. | Spin motion. |
| Answer» C. To and fro motion. | |
| 56. |
When the net torque acting on a system is zero, which of the following will be constant? |
| A. | Linear momentum |
| B. | angular momentum |
| C. | None of these |
| D. | Force |
| Answer» C. None of these | |
| 57. |
The motion of electrons round the nucleus is an example of? |
| A. | Translatory motion. |
| B. | Orbital motion. |
| C. | Spin motion. |
| D. | Vibrational motion. |
| Answer» C. Spin motion. | |
| 58. |
Rotatory motion is of two kinds: (i) Spin motion and (ii) ? |
| A. | Circular motion. |
| B. | Orbital motion. |
| C. | Translatory motion. |
| D. | Vibrational motion. |
| Answer» C. Translatory motion. | |
| 59. |
The daily rotation of the earth about its own axis,-rotation of fly wheel about its axle, a rotating top are all the examples of? |
| A. | Rotatory motion. |
| B. | Circular motion. |
| C. | Orbital motion. |
| D. | Spin motion. |
| Answer» E. | |
| 60. |
Larger the moment arm, the greater will be the? |
| A. | Velocity |
| B. | Torque |
| C. | Momentum |
| D. | Axis of rotation. |
| Answer» C. Momentum | |
| 61. |
Two forces which are equal in magnitude but opposite in direction and not acting along the same line is a? |
| A. | Rotation |
| B. | Couple |
| C. | Torque |
| D. | Motion |
| Answer» C. Torque | |
| 62. |
If the axis of rotation passes through the body itself the corresponding motion is called? |
| A. | Translatory motion. |
| B. | Spin motion. |
| C. | Swinging motion. |
| D. | Rotatory motion. |
| Answer» C. Swinging motion. | |
| 63. |
A body is said to be in dynamic equilibrium? |
| A. | When it is moving with changing acceleration |
| B. | When it is in uniform motion along a circular path. |
| C. | When it possess instantaneous velocity. |
| D. | When it is in uniform motion along a straight line. |
| Answer» B. When it is in uniform motion along a circular path. | |
| 64. |
The motion of planets round the Sun is an example of? |
| A. | Translatorv motion. |
| B. | Vibrational motion. |
| C. | Spin motion. |
| D. | Orbital motion. |
| Answer» E. | |
| 65. |
The greater the force, the larger will be the |
| A. | Torque |
| B. | mass |
| C. | Axis of rotation. |
| D. | Centre of mass. |
| Answer» B. mass | |
| 66. |
Counter..clockwise rotation is taken as? |
| A. | Zero |
| B. | Positive |
| C. | Neutral |
| D. | Negative |
| Answer» C. Neutral | |
| 67. |
A body is said to be in static equilibrium? |
| A. | When it is moving around a circular path. |
| B. | When it is moving with uniform velocity. |
| C. | When it is a. rest. |
| D. | When it is accelerated by the external force. |
| Answer» D. When it is accelerated by the external force. | |
| 68. |
The centre of mass of a system of particles? |
| A. | None of these. |
| B. | Coincides with the centre of gravity only in a uniform gravitational field. |
| C. | Coincides always with the centre of gravity. |
| D. | Never coincides with the centre of gravity. |
| Answer» C. Coincides always with the centre of gravity. | |
| 69. |
The torque or moment due to a couple is called: |
| A. | Moment |
| B. | Moment of couple |
| C. | None of these |
| D. | Moment arm |
| Answer» B. Moment of couple | |
| 70. |
The principle of parallel forces states that the resultant of a number of .parallel forces is numerically equal to: |
| A. | All of the above |
| B. | the algebraic sum of the force |
| C. | None of the above |
| D. | The sum of the forces |
| Answer» D. The sum of the forces | |
| 71. |
The particle moving with constant velocity may be: |
| A. | Travelling in a circle |
| B. | In equilibrium |
| C. | Acceleration |
| D. | Changing in direction |
| Answer» E. | |
| 72. |
Two forces, which are equal in mangnitude but opposite in. direction, acting along parallel lines constitute a |
| A. | Moment |
| B. | Couple |
| C. | Moment arm |
| D. | None of these |
| Answer» D. None of these | |
| 73. |
Two forces which form a couple: |
| A. | Can not be replaced by a single equivalent force |
| B. | Arc perpendicular to each other |
| C. | Arc parallel to each other |
| D. | Can be replaced by a single equivalent force |
| Answer» C. Arc parallel to each other | |
| 74. |
The direction of torque is along: |
| A. | perpendicular to the plane containing the force and displacement vector |
| B. | The direction of force |
| C. | The direction of displacement vector |
| D. | Vertical line |
| Answer» B. The direction of force | |
| 75. |
If the displacement vector r makes an angle θ with direction of force F, then the manitude of the torque is given by: |
| A. | F r Sin θ |
| B. | Fr Cosθ |
| C. | Fr tanθ |
| D. | Fr cosθ |
| Answer» E. | |
| 76. |
The center of gravity is the point at which the____________ may be considered to act |
| A. | Mass |
| B. | Torque |
| C. | Weight |
| D. | None of these |
| Answer» B. Torque | |
| 77. |
The magnitude of the moment of a couple is equal to: |
| A. | Area of the couple |
| B. | magnitude of any of the force forming the couple |
| C. | Magnitude of any of the forces forming the couple |
| D. | None of these |
| Answer» B. magnitude of any of the force forming the couple | |
| 78. |
If a body in similar circumstances stay where it is placed, then the body is said to be in _______ equilibrium: |
| A. | Stable |
| B. | Unstable |
| C. | Neutral |
| D. | Dynamic |
| Answer» E. | |