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At high frequencies the capacitive reactance _________(a) is constant(b) increases(c) decreases(d) becomes zeroI have been asked this question in an internship interview.Asked question is from Consideration in Selecting Voltmeter in portion Electronic Instruments of Electrical Measurements

Answer»

Right option is (c) decreases

The explanation is: We KNOW that the capacitive reactance is INVERSELY PROPORTIONAL to the frequency.

Xc ∝ ^1⁄f

At high frequencies, the capacitive reactance becomes very small.



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