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Oscillations

The excitatio...

Question

The excitation frequency of an LVDT is 2 kHz. The maximum frequency of displacement should be limited to

A

200 Hz

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B

1.5 kHz

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C

2 kHz

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D

2.5 kHz

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Solution

The correct option is A 200 Hz
For accurate filtering and demodulation of the signal a frequency ratio of 10 : 1 is followed:

$∴$ Maximum frequency of displacement should be limited to
$= \frac{2 k H z}{10} = \frac{2000}{10} = 200 H z$

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