MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A string of length 0.4m and mass 10(-2) kg is tightly clamped at its ends. The tension in the string is 1.6N. Identical wave pulses are produced at one end at equal intervals of time, ∆t. The minimum value of ∆t which allows constructive interference between successive pulses is? |
| A. | 0.05s |
| B. | 0.10s |
| C. | 0.20s |
| D. | 0.40s |
| Answer» C. 0.20s | |
| 2. |
An organ pipe P1 closed at one end of vibrating in its first harmonic and another pipe P2 open at both ends vibrating in its third harmonic are in resonance with a given tuning fork. The ratio of the length of P1 to that of P2 is? |
| A. | 8/3 |
| B. | 3/8 |
| C. | 1/6 |
| D. | 1/3 |
| Answer» D. 1/3 | |
| 3. |
A siren placed at a railway platform is emitting sound of frequency 5kHz. A passenger sitting in a moving train ‘A’ records a frequency of 5.5 kHz while the train approaches the siren. During his return journey in a different train B he records a frequency of 6kHz while approaching the same siren. The ratio of the velocity of train B to that train A is? |
| A. | 242/252 |
| B. | 2 |
| C. | 5/6 |
| D. | 11/6 |
| Answer» C. 5/6 | |
| 4. |
A train moves towards a stationary observer with speed 34m/s. The train sounds a whistle and its frequency registered by the observer is f1. If the train’s speed is reduced to 17m/s, the frequency registered is f2. If the speed of sound is 340m/s, then the ratio f1/f2 is? |
| A. | 18/19 |
| B. | 1/2 |
| C. | 2 |
| D. | 19/18 |
| Answer» E. | |