NEET Physics: Questions 1909 - 1913 of 2098
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Question number: 1909
» Experimental Skills » Transistor
Question
Current gain is maximum in which of the following configuration of a transistor?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Common base configuration |
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| b. | Common collector configuration |
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| c. | Common emitter configuration |
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| d. | Equal in both common emitter and common base configuration |
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Question number: 1910
» Oscillations and Waves » Beats
Question
Two sirens situated one kilometer apart are producing sound of frequency 330 Hz. An observer starts moving from one siren to the other with a speed of 2 m/s. If the speed of sound be 330 m/s, what will be the beat frequency heard by the observed
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 8 |
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| b. | 6 |
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| c. | 4 |
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| d. | 1 |
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Question number: 1911
Question
The refractive index of the material of a prism does not depend on which of the following factor?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Temperature |
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| b. | Nature of the material |
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| c. | Wavelength or colour of light |
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| d. | Angle of the prism. |
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Question number: 1912
» Oscillations and Waves » Beats
Question
A person carrying a whistle emitting continuously a note of 272 Hz is running towards a reflecting surface with a speed of 18 km/hour. The speed of sound in air is 345ms -1. The number of beats heard by him is,
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 8 |
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| b. | 3 |
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| c. | 4 |
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| d. | 6 |
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Question number: 1913
» Oscillations and Waves » Resonance
Question
If in an experiment for determination of velocity of sound by resonance tube method using a tuning fork of 512 Hz, first resonance was observed at 30.7 cm and second was obtained at 63.2 cm, then maximum possible error in velocity of sound is (consider actual speed of sound in air is 332 m/s)
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 58 cm/sec |
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| b. | 80 cm/sec |
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| c. | 204 cm/sec |
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| d. | 110 cm/sec |
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