MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
A body is initially at rest. It explodes into two objects of mass 1 Kg and 2 Kg moving with a speed of 0.6 times the speed of velocity each. What would be the mass of the original body at rest? |
| A. | 2 Kg |
| B. | 2.5 Kg |
| C. | 3.5 Kg |
| D. | 3.75 Kg |
| Answer» E. | |
| 2. |
An object of rest mass 6 Kg is moving with a speed of 0.8c. Its effective mass is ____________ |
| A. | 6 Kg |
| B. | 8 Kg |
| C. | 10 Kg |
| D. | 12 Kg |
| Answer» D. 12 Kg | |
| 3. |
At what speed the mass of an object would be double its value at rest? |
| A. | √2 c |
| B. | c/√2 |
| C. | √3c/2 |
| D. | 2c/√3 |
| Answer» D. 2c/√3 | |
| 4. |
The speed of light is a limiting velocity, unattainable by a material body. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Which basic law is used for the derivation of mass variation with velocity? |
| A. | Law of conservation of Energy |
| B. | Law of conservation of Kinetic Energy |
| C. | Law of conservation of Momentum |
| D. | Law of conservation of mass |
| Answer» D. Law of conservation of mass | |
| 6. |
If the direction of velocity is changed by 180o simultaneously, the mass would _____________ |
| A. | Change simultaneously |
| B. | Not Change |
| C. | Increase |
| D. | Decrease |
| Answer» C. Increase | |
| 7. |
The rest mass of a photon is equal to ___________ |
| A. | Gravitational mass |
| B. | Relativistic mass |
| C. | Inertial mass |
| D. | Zero |
| Answer» E. | |
| 8. |
The lowest possible mass of a particle is its _____________ |
| A. | Relativistic mass |
| B. | Inertial mass |
| C. | Gravitational mass |
| D. | Rest mass |
| Answer» E. | |