Q. The total number of pulses in a TV remote control is

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Q. Which camera tube has highest sensitivity and very wide spectral response?

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Q. Assertion (A): A Smith chart can be used for a number of calculations of a transmission line

Reason (R): Smith chart is basically a polar impedance diagram.

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Q. A computer monitor uses 180 W in normal operation and 20 W in sleep mode. The computer is on all the 24 hours but is in sleep mode for 18 hours a days. The energy units saved in 30 days are

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Q. Consider the following functions

1. It detects the AM video carrier IF so as to produce the video signal
2. It produces and separates out the inter carrier sound IF of 5.5 MHz
3. It amplifies the video signal
4. It amplifies the audio signal

The video detector in a colour TV performs which of the above functions

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Q. A 1000 kHz carrier is simultaneously modulated by 300 Hz and 2 kHz audio sine wave. Which of the following frequencies will not be present in the output?

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Q. SWR for a transmission line is infinity when the load is

1. Short circuit
2. Complex impedance
3. Open circuit
4. Pure reactance

Of the above statements:

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Q. The discone antenna is

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Q. The direction of pick up in a CD is

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Q. A (75 - j 50) Ω load is connected to a coaxial line of Z0 = 75 Ω at 10 GHz. The best method of matching consists of using

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Q. Consider the following test signal patterns

1. Ramp
2. Grill
3. Grey shades
4. Sine pulse
5. Picture line up generating equipment

Which of the above are used in TV studios?

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Q. If aspect ratio is 4/3 and number of lines in each frame is 625, the number of picture elements in one frame is

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Q. Indicate the false statement: If SWR on a transmission line is infinite, the line is terminated in

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Q. In TV signals colour burst is used

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Q. The resonant frequency of an RF amplifier is 1 MHz and its bandwidth is 10 kHz. The Q factor will be

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Q. Two sinusoidal signals of same amplitude and frequencies 10 kHz and 10.1 kHz are added together. The combined signal is given to an ideal frequency detector. The output of the detector is

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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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