The frequency of second mode of vibration for a quartz ofpiezoelectric oscillator is _____ Hz if the velocity of longitudinalwaves in quartz crystal is 5.5 x 10^3 m/s and thickness of quartzcrystal is 0.05 m
Question
The frequency of second mode of vibration for a quartz ofpiezoelectric oscillator is _____ Hz if the velocity of longitudinalwaves in quartz crystal is 5.5 x 10^3 m/s and thickness of quartzcrystal is 0.05 m
Solution
The frequency of vibration for a piezoelectric oscillator can be calculated using the formula:
f = v / 2d
where: f is the frequency, v is the velocity of the longitudinal waves in the quartz crystal, and d is the thickness of the quartz crystal.
Given that the velocity v is 5.5 x 10^3 m/s and the thickness d is 0.05 m, we can substitute these values into the formula to find the frequency of the first mode of vibration:
f1 = (5.5 x 10^3 m/s) / (2 * 0.05 m) = 55,000 Hz or 55 kHz
However, the question asks for the frequency of the second mode of vibration. In many oscillating systems, the frequency of the nth mode of vibration is n times the frequency of the first mode. Therefore, the frequency of the second mode of vibration would be:
f2 = 2 * f1 = 2 * 55,000 Hz = 110,000 Hz or 110 kHz
So, the frequency of the second mode of vibration for the quartz of the piezoelectric oscillator is 110,000 Hz or 110 kHz.
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