Which of the following statements is NOT true of a bridge circuit?

Question

Which of the following statements is NOT true of a bridge circuit?

The balance equation is independent of the magnitude of its input voltage and its source impedance.
The bridge circuit can be used in a control circuit.
The balance equation is independent of the sensitivity of the null detector.
Accuracy is low

LohaHridoy

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2025-01-04 04:42

1 Answers

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AhmedNazir · Accepted Answer · 2022-09-04T04:29:57+06:00

Option 4 : Accuracy is low

Bridge Circuit:

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Bridge circuits are used very commonly as a variable conversion element in measurement systems and produce an output in the form of a voltage level that changes as the measured physical quantity changes.
They provide an accurate method of measuring resistance, inductance, and capacitance values, and enable the detection of very small changes in these quantities about a nominal value.

Characteristics of a Bridge Circuit:

A bridge circuit consists of 4 arms, a source, and a detector.
The source and the detector are always present in the opposite arms.
The accuracy of a bridge is very high.
The bridge condition is Z₁Z₄ = Z₂Z_3. Hence, the balanced equation is independent of the magnitude of its input voltage and its source impedance.
During the balanced condition of the bridge, zero current flows through the detector. Hence, the balanced equation is independent of the sensitivity of the null detector.
The bridge circuit can be used in a control circuit.