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What is the relation between capacitance and output impedance?(a) proportional to square(b) constant(c) directly proportional(d) inversely proportionalThis question was addressed to me during an interview.Query is from Capacitive Transducer topic in portion Transducers of Electrical Measurements

Answer»

The correct choice is (d) inversely proportional

To explain I would say: When the capacitance is LOW in the range of pico-farads, output IMPEDANCE tends to a high VALUE. This LEADS to LOADING effect.



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