Below are the answers key for Multiple Choice Questions in Chapter 2: Noise from the book Electronic Communication Systems by George Kennedy. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.
1. d. transit-time noise
2. b. Impulse noise voltage is independent of bandwidth.
3. d. unchanged
4. a. Input noise voltage
5. c. Atmospheric noise
6. c. Boltzmann’s constant
7. a. noise generated in the receiver
8. c. between 20 to 120 MHz
9. d. calculations are based on RMS values
10. b. noise factor
11. c. Noise is mixers is caused by inadequate image frequency rejection
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