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  1. A piezo-electric force sensor, connected by a cable to a voltage amplifier, has the following parameters : 
    Crystal properties : Stiffness 109 N/m, Damping ratio 0.01, Natural frequency 105 rad/s, Force-to-Charge sensitivity 10-9 C/N, Capacitance 10-9 F with its loss angle assumed negligible 
    Cable properties : Capacitance 2 × 10-9 F with its resistance assumed negligible 
    Amplifier properties : Input impedance 1 MΩ, Bandwidth 1MHz , Gain 3 
    The maximum frequency of a force signal in Hz below the natural frequency within its useful midband range of measurement, for which the gain amplitude is less than 1.05, approximately is,
    2. A.
    35
    B.
    350
    C.
    3500
    D.
    16 * 103

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    Workspace

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    Answer : Option C

    Explanation :

    -NA-

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