Q. The accelerometer is used as a transducer to measure earthquake in Richter scale. Its design is based on the principle that ______.

• (A) its natural frequency is very low in comparison to the frequency of vibration
• (B) its natural frequency is very high in comparison to the frequency of vibration
• (C) its natural frequency is equal to the frequency of vibration
• (D) measurement of vibratory motion is without any reference point