Saturday, April 10, 2021
The analogue signal from a microphone is to be transmitted in digital form.
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Question 10 The analogue signal from a microphone is to be transmitted in digital form. The variation with time t of part of the signa...
Saturday, March 27, 2021
The sinusoidal carrier wave has a frequency of 750 kHz and an amplitude of 5.0 V. The carrier wave is frequency modulated by a sinusoidal signal of frequency 7.5 kHz and amplitude 1.5 V.
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Question 9 A carrier wave is frequency modulated. (a) Describe what is meant by frequency modulation . [2] (b) The sinusoida...
Thursday, March 18, 2021
A radiation detector is placed close to a radioactive source. The detector does not surround the source.
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Question 22 (a) A radiation detector is placed close to a radioactive source. The detector does not surround the source. Radiation...
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