Question : A ______ is used to detect acoustic signals under the water.
Option 1: ammeter
Option 2: hydrophone
Option 3: pyrometer
Option 4: bolometer
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Correct Answer: hydrophone
Solution : The correct answer is hydrophone .
A hydrophone is used to detect acoustic signals under the water. Hydrophones are devices designed to capture and convert underwater sound waves into electrical signals for various purposes, including scientific research, communication and military applications. They play a crucial role in underwater acoustics and are commonly used in sonar systems to detect and analyse sound in the ocean.
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