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Mr. Dubey • 51.62K Points
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Q.) In the equivalent circuit of a quartz crystal, LCR arm has an inductance of 4 mH and capacitor has a value of 4nF, then the series resonant frequency of the oscillator is:

(A) 0.25 mhz
(B) 2.5 mhz
(C) 25 mhz
(D) 5 mhz
Correct answer : Option (A) - 0.25 mhz

Explanation:
 the series resonant frequency of a crystal oscillator is given by 1/√lc. substituting the given values of l and c in the expression, the series resonant frequency is 0.25 mhz.

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