Q. In Vidicon camera tube, the resistance of photoconductive material on the target plate

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Q. Which of the following are useful in comparing the noise performance of receivers?

1. Input noise voltage
2. Noise figure
3. Noise resistance
4. Noise temperature

Select answer as per the following codes:

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Q. Push pull amplifier is

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Q. The tape recorders used in homes have

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Q. In a communication system, noise is most likely to affect the signal

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Q. Each frequency in the modulating wave gives rise to four side bands.

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Q. Assertion (A): CCIR-B system has 625 scanning lines per frame and 2 : 1 interlace.

Reason (R): The aspect ratio is 4 : 3

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Q. At night the ionosphere can be considered to be consisting of

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Q. A balun transformer gives an impedance transformation of

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Q. Which one of the following is true?

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Q. A 1000 kHz carrier wave modulated 40% at 40000 Hz is applied to a resonant circuit tuned to a carrier frequency and having Q = 140. What is the degree of modulator after transmission through the circuit?

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Q. The EHT voltage in a picture tube of TV is

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Q. Assertion (A): For satellites and space probes, PRF of a radar is pretty low.

Reason (R): PRF of a radar depends on the range of a radar.

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Q. An S/N ratio of 3 expressed in db is

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Q. The material used for the magnet of moving coil cone type loudspeaker is

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Q. CCIR system B employs

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Q. The power to the base unit of a cordless telephone is supplied by

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Q. In cellular telephone each cell is designed to handle

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Q. A UPS contains

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Q. A transmitter power of 10 W is increased by 30 dB. The effective radiated power is

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