Q. Which of the following microphones works on the piezoelectric effect?

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Q. In PAL system weighting of R - Y and B - Y signals is done to

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Q. In case of probability of the message is 1 to 16 then the information will be

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Q. The saving of power in DSB-SC modulated at 80% is

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Q. In a perfect conductor the resistor noise is

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Q. An RF carrier of 12 kV at 1 MHz is amplitude modulated by 1 kHz signal having peak value of 6 kV. The modulation pattern is seen on CRO screen. The voltage indicated will be

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Q. In push pull amplifier, each transistor conducts for

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Q. In the television system in India, each channel is allowed a bandwidth of

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Q. A diode detector load consists of 0.01 μF capacitor in parallel with a 5 k ohms resistor. The maximum depth of modulation without diagonal clipping at modulating frequency of 1000 Hz and 10 kHz is

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Q. In the television system in India, each frame is scanned

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Q. Each kilometer of travel in electromagnetic radiation means a time delay of

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Q. A video monitor is exactly similar to TV receiver.

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Q. A RADAR can be used to

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Q. In single tone AM modulation, the transmission efficiency for m = 1 is

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Q. A remote control of TV uses a 10 bit word. The maximum number of total commands it can transmit is

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Q. Telecine equipment in a TV studio consists of

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Q. TV signal strength when expressed in dB m has the reference of

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Q. A sinusoidal voltage amplitude modulates a carrier of peak value 5 kV. Each side band has an amplitude of 500 V. The modulation index is

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Q. Kell factor is about

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Q. AM amplifier having noise figure of 20 dB and available power gain of 15 dB is followed by a mixer circuit having noise figure of 9 dB. The overall noise figure as referred to input in dB is

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