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Communication Systems

Communication Systems
A modem is classified as low speed if data rate handled is

Upto 400 bps
Upto 100 bps
Upto 600 bps
Upto 250 bps

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Communication Systems
The colour of an object is decided by

The reflected colour
The wavelength transmitted through it
None of these
Reflected colour for opaque object and wavelength transmitted through it for transparent objects

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Communication Systems
Which of the following does not cause losses in optical fibre cables?

Impurities
Attenuation in glass
Stepped index operation
Microbending

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Communication Systems
For attenuation of high frequencies we should use

Resistance
Shunt capacitance
Series capacitance
Inductance

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Communication Systems
Full duplex operation permits transmission in both directions at the same time.

False
True

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Communication Systems
As per Shannon-Hartley theorem, a noise less Gaussian channel has

Small capacity
None of these
Infinite capacity
Zero capacity

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