NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1883 - 1887 of 2142
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Question number: 1883
» Communication System » Bandwidth of Transmission Medium
Question
In a communication system, noise is most likely to affect the signal
Choices
| Choice (4) | Response | |
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| a. | In the information source I |
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| b. | At the transmitter |
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| c. | In the channel or in the transmission line |
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| d. | None of the above |
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Question number: 1884
» Gravitation » Orbital Velocity of a Satellite
Assertion (Ꭺ)
The speed of revolution of an artificial satellite revolving very near the earth is 8 kms -1.
Reason (Ꭱ)
Orbital velocity of a satellite, become independent of height of near satellite.
Choices
| Choice (4) | Response | |
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| a. | Ꭺ is true but Ꭱ is false |
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| b. | Both Ꭺ and Ꭱ are false |
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| c. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ |
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| d. | Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ |
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Question number: 1885
» Oscillations and Waves » Beats
Question
A source of sound of frequency 233 Hz is moving rapidly towards a wall with a velocity of 3.5 m/s. The speed of sound is 330 m/s. If the observer is between the wall and the source, then the beats heard per second will be,
Choices
| Choice (4) | Response | |
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| a. | 4.2 Hz |
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| b. | 5.3 Hz |
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| c. | 4.9 Hz |
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| d. | Zero |
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Question number: 1886
» Gravitation » Escape Velocity
Question
Acceleration due to gravity on a planet is 10 times the value on the earth. Escape velocity for the planet and the earth are V p and V e respectively. Assuming that the radii of the planet and the earth are the same, then –
Choices
| Choice (4) | Response | |
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| a. |
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| b. |
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| c. |
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| d. |
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Question number: 1887
» Oscillations and Waves » Beats
Question
A sound wave of frequency travels horizontally to the right. It is reflected from a large vertical plane surface moving to the left with a speed V. The speed of sound in the medium is c.
Choices
| Choice (4) | Response | |
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| a. | The number of beats hears by a stationary listener to the left of the reflecting surface is |
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| b. | The frequency of the reflected wave is |
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| c. | The number of waves striking the surface per second is |
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| d. | The wavelength of the reflected wave is |
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