New Enroll for RBI, PFRDA & NABARD Intro Class! April 18 at 9:15 PM

    Question

    Which of the following is a lie detector

    machine?
    A Tachometer Correct Answer Incorrect Answer
    B Telescope Correct Answer Incorrect Answer
    C Photometer Correct Answer Incorrect Answer
    D Polygraph Correct Answer Incorrect Answer

    Solution

    The machine most commonly used in lie detection is the polygraph. Quickly reviewing some of the highlights of its development, the polygraph was foreshadowed in the mid-nineteenth century when Italian criminologist Cesare Lombroso utilized measures of pulse and blood pressure in the interrogation of suspects.

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