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If a radio receiver amplifies all the si...

 If a radio receiver amplifies all the signal frequencies equally well, it is said to have high

A

fidelity

B

distortion

C

sensitivity

D

selectivity

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The correct Answer is:
a
If a radio receiver amplifies all the signal frequencies equally well, it is said to have high fidelity
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A particle is subjected to two simple harmonic motions in the same direction having equal amplitudes and equal frequency. If the resultant amplitude is equal to the amplitude of the individual motions, find the phase difference between the individual motions.

Two travalling wavews of equal amplitudes and equal frequencies move in opposite directions along a string. They interfere to produce a standing wave having the equation y = A cos kx sin omega t in which A = 1.0 mm, k = 1.57 cm^(-1) and omega = 78.5 s^(-1) (a) Find the velocity of the component travelling waves. (b) Find the node closet to the origin in the x gt 0. (c ) Find the antinode closet to the origin in the region x gt 0 (d) Find the amplitude of the particle at x = 2.33cm.

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FULL MARKS-COMMUNICATION SYSTEMS-ADDITIONAL QUESTIONS(Multiple Choice Questions)
  1. If the highest modulating frequency of the wave is 5 kHz, the number o...

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  2. In communication with help of antenna if height is doubled, then the r...

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  3. A laser beam is used for carrying out surgery, because it

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  4. The ozone layer is present in

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  5. Ozone layer blocks the radiation of wavelength

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  6. What is the cause of Green house effect?

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  7. Ozone layer in atmosphere is useful, because it

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  8. Biological importance of ozone layer is

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  9. The particular used for transmission of light signal through optical ...

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  10. LANDSAT series of satellites move in near polar orbits at an altitude ...

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  11. Which of the following is not a transducer?

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  12. If a radio receiver amplifies all the signal frequencies equally well,...

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  13. The sky wave propagation is suitable for radio waves of frequency

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  14. Refractive index of ionosphere is

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  15. When radio waves pass through ionosphere phase difference between spac...

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  16. Advantages of optical fibres are

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  17. A TV tower has a height of 100 m. What is the maximum distance upto wh...

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  18. Modem is a device which performs

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  19. Which of the following device is full duplex?

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  20. For a radio signal to travel 150 km from the transmitter to a receivin...

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