WCM Chapter 2

Sine waves have a pure sound because they consist of energy at only _______ frequency.

• two

• half

• three

• one

What is the Nyquist Rate for 80 kHz signal frequency

• 240 kHz

• 80 kHz

• 160 kHz

• 40 kHz

The distance travelled by a wave during the time of one cycle is called the ____________.

• Wavelength

• Frequency

• Amplitude

• Period

Which one does not belong to Analogue to PCM conversion

• Sampling

• Signaling

• Encoding

• Quantization

In 'Unipolar Encoding', a Positive voltage represents ________, and Zero voltage indicates a __________

• 0, 0

• 1, 1

• 0, 1

• 1, 0

In 'Manchester' line coding, there is a transistion at ____________________.

• start & end of each bit period.

• middle of each bit period

• start of each bit period.

• end of each bit period

An analogue signal carries 4 bits in each signal element. If 1000 signal elements are sent per second, find the 'Baud Rate'.

• 1000 bauds per second

• 2000 bauds per second

• 4000 bauds per second

• 3000 bauds per second

The 'Frequency' of a signal measures the ________________________________.

• Number of complete cycles per second.

• Changes between peaks

• Time taken for a cycle to complete.

• Difference between upper and lower frequency

What is the term known of for transfer one form energy to another form of energy?

• Transducer

• capacitor

• Transistor

• resistor

Sound waveforms can be broken down into a series of frequency components known as ________________________.

• Microwaves

• harmonics

• gramma ray

• X-ray