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. |
An atom A, moving relative to the observer, with velocity 2 X 108m/s emits a particle B which moves with a velocity of 2.8 X 108m/s with respect to the atom. The velocity of the emitter particle relative to the scientist is _____________ |
| A. | 0.8 X 10<sup>8</sup>m/s |
| B. | 2.4 X 10<sup>8</sup>m/s |
| C. | 3 x 10<sup>8</sup>m/s |
| D. | 2.95 X 10<sup>8</sup>m/s |
| Answer» E. | |
| 2. |
Two particles approach each other with a velocity of 0.9 c. What is their relative velocity as observed by A? |
| A. | 0.9 c |
| B. | 0 |
| C. | 0.99 c |
| D. | 0.94 c |
| Answer» D. 0.94 c | |
| 3. |
For u < c and v < c the equation becomes ____________ |
| A. | u = ( frac{u^{ }+v}{ frac{u^{ }v}{c^2}} ) |
| B. | u = ( frac{u^{ }+v}{1+u^{ }v} ) |
| C. | u = 1+ ( frac{u^{ }v}{c^2} ) |
| D. | u = u + v |
| Answer» E. | |
| 4. |
In Lorentzian relativity, if two events are simultaneous for one observer, they will be simultaneous for all other observers as well. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
Lorentz transformations are based on the principle of consistency of the velocity of light. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
When a particle is moving with a velocity of light c relative to S, its velocity as observed by an observer in the frame S is _____________ |
| A. | Zero |
| B. | 0.5 c |
| C. | 0.75 c |
| D. | c |
| Answer» E. | |
| 7. |
In the case v << c, Lorentz transformation is the same as ____________ |
| A. | Einstein s transformation |
| B. | Galilean transformation |
| C. | Maxwell s transformation |
| D. | Planck s transformation |
| Answer» C. Maxwell s transformation | |
| 8. |
What would be the mass of the body at rest, if it explodes into two objects of mass 2 kg each moving with a speed 0.8c relative to the original body? |
| A. | 4 Kg |
| B. | 5.4 Kg |
| C. | 6.2 Kg |
| D. | 6.7 Kg |
| Answer» E. | |
| 9. |
Two particles approach each other with a speed 0.8 c with respect to the laboratory. Their relative speed is ___________ |
| A. | 0.912 c |
| B. | 0.95 c |
| C. | 0.975 c |
| D. | 0.85 c |
| Answer» D. 0.85 c | |