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Write the function of (i) Transducer and...

Write the function of (i) Transducer and (ii) Repeater in the context of communication system.

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(i) Transducer : A transducer is a device, which converts one form of energy into another.
(ii) Repeater : A repeater is a combination of receiver and transmitter placed along the path of signal so as to extent the range of the communication system.
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