On which basis does the working of metal detector depend?
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the working of metal detector detector depends on the ultrasonic waves or sonar .the metal detector consists of a transmitter and a reciever . the transmitter transmits the ultrasonic waves and then after the reflection it gets back and are detected by the detector .if they are not detected the metal detector makes the alarm ring due to which we are able to detect holes,cracks etc. so this is the working of metal detector i hope you like it
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