Use of seismometer as velometer

Q.  Which of the following conditions is/are to be satisfied by the seismometer for it to be used as velometer?
- Published on 10 Sep 15

a. It's natural frequency should be large
b. It's natural frequency should be small
c. It's output signal should be proportional to relative acceleration of the vibrating body
d. None of the above

ANSWER: It's natural frequency should be small

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