Q. What is the frequency of the EM wave with a wavelength of 12 cm?

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Q. A signal travels a distance of 75 ft in the time it takes to complete 1 cycle. What is its frequency?
(1m = 3.28 ft)

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Q. The maximum peaks of an electromagnetic wave are separated by a distance of 8 inch. What is the frequency?

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Q. SHF Em waves are used in?

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Q. Which one of the following is not a source of infrared radiation?

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Q. Which one of the following is not a reason for not using X-rays in communication?

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Q. The portion of the electromagnetic spectrum occupied by a signal is called ________

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Q. What is the bandwidth of a signal having 928 Mhz and 902 Mhz as its upper and lower frequencies?

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Q. What is the upper frequency of a signal with a bandwidth of 6 Mhz, if the lower frequency limit is 54 Mhz?

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Q. Higher frequencies can have more channels for a particular bandwidth.

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Q. Which organization regulates international EM spectrum division?

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Q. What is the component in which the output voltage is higher than the input voltage?

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Q. What is the gain of the signal if output and input voltages are 700 V and 50 mV respectively?

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Q. What is the output signal voltage for a gain of 20 and input voltage of 20 mV?

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Q. The power output of an amplifier is 7 watts. The power gain is 80. What is the input power?

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Q. What is the total gain of amplifiers with a power gain of 6, 8, 5 when connected in series?

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Q. A two-stage amplifier has an input power of 30 μW and an output power of 1.5 mW. One stage has a gain of 3. What is the gain of the second stage?

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Q. What should be the gain of an amplifier to have no voltage loss or gain?

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Q. What should be the gain of an amplifier to have zero voltage loss if the signal is already attenuated half that of the original signal?

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Q. What is the value of the total gain if A represent attenuation and G represent gain and all are cascaded?

A₁=0.5 G₁=5

A₂=0.035 G₂=20

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