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LVDT works on the principle of ________

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LVDT works on the principle of ________

(a) variable resistance

(b) variable inductance

(c) variable capacitance

(d) variable pressure

I got this question during an interview.

Enquiry is from Displacement, Position and Motion Transducers in division Physiological Transducers of Biomedical Instrumentation

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Right answer is (b) variable inductance

Explanation: LVDT works on the principle of variable inductance. It has three coils namely the primary coil which is the center coil. The other two are called the secondary coils so connected that their outputs are equal in magnitude but opposite in phase.

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