MCQOPTIONS
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MCQOPTIONS
This section includes 9 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 moment of inertia of a body about a given axis is 1.2kgm2. Initially, the body at rest. In order to produce a rotational kinetic energy of 1500 joule, an angular acceleration of 25radian/sec2 must be applied about the axis for duration of ___________ |
| A. | 4s |
| B. | 2s |
| C. | 8s |
| D. | 10s |
| Answer» C. 8s | |
| 2. |
Statement 1: If polar ice melts, days will be longer.
|
| 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 the statement2 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» B. Both statement 1 and 2 are true but the statement2 is not the correct explanation of the statement1 | |
| 3. |
Moment of inertia of an object does not depend upon ___________ |
| A. | Mass of object |
| B. | Mass of distribution |
| C. | Angular velocity |
| D. | Axis of rotation |
| Answer» D. Axis of rotation | |
| 4. |
Analogue of mass in rotational motion is ___________ |
| A. | Moment of inertia |
| B. | Angular momentum |
| C. | Gyration |
| D. | Angular acceleration |
| Answer» B. Angular momentum | |
| 5. |
If a person standing on a rotating disc stretches out his hands, the angular speed will ___________ |
| A. | Increase |
| B. | Decrease |
| C. | Remains same |
| D. | Increases and then decreases |
| Answer» C. Remains same | |
| 6. |
Statement 1: If there is no external torque on the body about its centre of mass, then the velocity of the centre of mass remains constant.
|
| A. | Statements 1 and 2 are true and statement 2 is the correct explanation of statement 1 |
| B. | Statement one and two are true and statement2 is not the correct explanation of statement1 |
| C. | Statement 1 is true, statement 2 is false |
| D. | Statement 2 is true, statement 1 is false |
| Answer» E. | |
| 7. |
If the resultant of all the external forces acting on a system of particles is 0, then from an inertial frame, one can surely say that ___________ |
| A. | Linear momentum of the system does not change in time |
| B. | Kinetic energy of the system does not change in time |
| C. | Angular momentum of the system does not change in time |
| D. | Potential energy of the system does not change in time |
| Answer» B. Kinetic energy of the system does not change in time | |
| 8. |
A mass m is moving with a constant velocity along a line parallel to the x-axis, away from the origin. Its angular momentum with respect to the origin ___________ |
| A. | Is zero |
| B. | Remains constant |
| C. | Goes on increasing |
| D. | Goes on decreasing |
| Answer» C. Goes on increasing | |
| 9. |
The instantaneous speed of the point of contact during rolling is zero. |
| A. | True |
| B. | False |
| Answer» B. False | |