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Consider these statements: (I) radar is used to locate, guide, or identify objec

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1. Consider these statements: (I) radar is used to locate, guide, or identify objects like aeroplanes, ships, and missiles, (II) a TV remote is an electronic device containing an integrated circuit and other components, and (III) the loss of a signal’s strength during propagation through a channel is what defines ‘noise.’ Which are correct?

Statements I and II

Only statement II

Statements II and III

All three statements

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Statements I and II are correct. Statement III, however, confuses two distinct concepts — the loss of signal strength during propagation is properly called attenuation, while noise refers specifically to unwanted random disturbances added to a signal.

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Consider these statements: (I) radar is used to locate, guide, or identify objec

Keep practicing

Beyond the answer

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