MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The instantaneous acceleration of the point of contact during rolling is zero. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
A body of mass M while falling vertically downwards under gravity breaks into two parts, a body B of mass 1/3 M and body C of mass 2/3 M. The centre of mass of bodies B and C taken together shifts compared to that of body A towards ___________ |
| A. | Body C |
| B. | Body B |
| C. | Depends on the height of braking |
| D. | Does not shift |
| Answer» E. | |
| 3. |
The motion of planets in the solar system is an example of the conservation of ___________ |
| A. | Mass |
| B. | Linear momentum |
| C. | Angular momentum |
| D. | Energy |
| Answer» B. Linear momentum | |
| 4. |
The direction of angular velocity vector is along ___________ |
| A. | The tangent to the circular path |
| B. | The inward radius |
| C. | The outward radius |
| D. | The axis of rotation |
| Answer» E. | |
| 5. |
Statement 1: If ice caps of the pole melt, the day length will shorten.Statement 2: Ice flows towards the equator and decreases the moment of inertia of the earth and hence increases the frequency of rotation of the earth. |
| A. | Both statement 1 and 2 are true and statement2 is the correct explanation of statement 1 |
| B. | Both statement 1 and 2 are true but statement 2 is not the correct explanation of statement 1 |
| C. | Statement 1 is true but statement 2 is false |
| D. | Statement 1 and 2 are false |
| Answer» E. | |
| 6. |
Statement 1: The earth is slowing down and as a result, the moon is coming nearer to it.Statement 2: The angular momentum of the earth-moon system is not conserved. |
| A. | Both statement 1 and 2 are true and statement2 is the correct explanation of the statement1 |
| B. | Both statement 1 and 2 are true but statement 2 is not the correct explanation of the statement1 |
| C. | Statement 1 is true but statement 2 is false |
| D. | Statement 1 and 2 are false |
| Answer» E. | |
| 7. |
Three identical metal balls, each of the radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed when centres of three balls are joined. The centre of the mass of the system is located at ___________ |
| A. | Line joining centres of any two balls |
| B. | Centre of one of the balls |
| C. | Horizontal surface |
| D. | Point of intersection of the medians |
| Answer» E. | |
| 8. |
A flywheel is attached to an engine to ___________ |
| A. | Increase its speed |
| B. | Decrease its speed |
| C. | Help in overcoming the dead point |
| D. | Decrease its energy |
| Answer» D. Decrease its energy | |
| 9. |
Two racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively. Their speeds are such that each makes a complete circle in the same time t. The ratio of the angular speeds of the first two to the second car will be ____________ |
| A. | 1:1 |
| B. | r1:r2 |
| C. | m1:m2 |
| D. | m1 m2:r1 r2 |
| Answer» B. r1:r2 | |
| 10. |
A_BODY_OF_MASS_M_WHILE_FALLING_VERTICALLY_DOWNWARDS_UNDER_GRAVITY_BREAKS_INTO_TWO_PARTS,_A_BODY_B_OF_MASS_1/3_M_AND_BODY_C_OF_MASS2/3_M._THE_CENTRE_OF_MASS_OF_BODIES_B_AND_C_TAKEN_TOGETHER_SHIFTS_COMPARED_TO_THAT_OF_BODY_A_TOWARDS?$ |
| A. | Body C |
| B. | Body B |
| C. | Depends on height of braking |
| D. | Does not shift |
| Answer» E. | |
| 11. |
The_instantaneous_acceleration_of_the_point_of_contact_during_rolling_is_zero.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
The motion of planets in the solar system is an example of the conservation o? |
| A. | Mass |
| B. | Linear momentum |
| C. | Angular momentum |
| D. | Energy |
| Answer» B. Linear momentum | |
| 13. |
The direction of angular velocity vector is along |
| A. | The tangent to the circular path |
| B. | The inward radius |
| C. | The outward radius |
| D. | The axis of rotation |
| Answer» E. | |
| 14. |
A solid sphere of radius R is placed on smooth horizontal surface. A horizontal force F is applied at height h from the lowest point. For the maximum acceleration of the centre of mass, which is correct? |
| A. | h=R |
| B. | h=2R |
| C. | h=0 |
| D. | No relation between h and R |
| Answer» E. | |
| 15. |
Three identical metal balls, each of the radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed when centres of three balls are joined. The centre of the mass of the system is located at |
| A. | Line joining centres of any two balls |
| B. | Centre of one of the balls |
| C. | Horizontal surface |
| D. | Point of intersection of the medians |
| Answer» E. | |
| 16. |
A flywheel is attached to an engine to |
| A. | Increase its speed |
| B. | Decrease its speed |
| C. | Help in overcoming the dead point |
| D. | Decrease its energy |
| Answer» D. Decrease its energy | |
| 17. |
Two racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively. Their speeds are such that each makes a complete circle in the same time t. The ratio of the angular speeds of the first two to the second car will be |
| A. | 1:1 |
| B. | r<sub>1</sub>:r<sub>2</sub> |
| C. | m<sub>1</sub>:m<sub>2</sub> |
| D. | m<sub>1</sub> m<sub>2</sub>:r<sub>1</sub> r<sub>2</sub> |
| Answer» B. r<sub>1</sub>:r<sub>2</sub> | |