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The bridge circuit shown in the figure below is used for the measurement of an unknown element $Z_x$. The bridge circuit is best suited when $Z_x$ is a

1. low resistance
2. high resistance
3. low Q inductor
4. lossy capacitor

Correct answer: lossy capacitor

Solution

The bridge shown is an AC bridge arrangement intended for measuring an unknown impedance with significant loss. Such bridges are especially suitable for lossy capacitors because they can determine both capacitance and loss factor accurately. Therefore, the best-suited element is a lossy capacitor.

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