110) Fourier series of a periodic rectangular wave has a

continuous spectrum

discontinuous spectrum

none of these

discrete spectrum

Answer is:

discrete spectrum

Explanation:

Fourier series of a periodic rectangular pulse has a continuous sepctrum

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111) for a signal to be reproduced without distortion

none of these

only the fundamental and first harmonic is required

All the harmonics should be present

only the fundamental is required

Answer is:

All the harmonics should be present

Explanation:

for a signal to be reproduced without distortion alll harmonics should be present

112) Audio signals have a maximum bandwidth of about

2000 kHz

200 kHz

20 kHz

2 kHz

Answer is:

20 kHz

Explanation:

The SI unit of audio frequency is the hertz (Hz). It is the property of sound that most determines pitch. The generally accepted standard range of audible frequencies is20 to 20,000 Hz, although the range of frequencies individuals hear is greatly influenced by environmental factors.