Communication Systems
The colour of an object is decided by

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

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Communication Systems
Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation.

Both A and R are correct and R is correct explanation of A
A is correct but R is wrong
Both A and R are correct but R is not correct explanation of A
A is wrong but R is correct

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Communication Systems
DVD uses

Laser beam for both recording and playback
Laser beam for recording and video head for playback
Video head for recording and laser beam for playback
None of these

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