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Communication Systems

Communication Systems
For a given carrier wave, maximum undistorted power is transmitted when value of modulation is

0.8
1
0.5

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Communication Systems
In EM waves, polarization

Is always vertical in an isotropic medium
Is due to transverse nature of waves
Results from longitudinal nature of waves
Is caused by reflection

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Communication Systems
For AM receivers the standard IF frequency is

1.07 MHz
106 kHz
10.7 MHz
455 kHz

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Communication Systems
The main function of a balanced modulator is to

Produce 100% modulation
Produce balanced modulation of a carrier wave
Limit noise picked by a receiver
Suppress carrier signal in order to create a single-sideband or double sideband

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Communication Systems
FM transmitting and receiving equipment as compared to AM equipment is

None of these
Almost equally costly
Cheaper
Costly

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Communication Systems
The colour of an object is decided by

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

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