Bridge circuit - Impedance of instrument measuring the output voltage

Q.  In bridge circuit, the impedance of the instrument measuring the output voltage must be
- Published on 03 Nov 15

a. Equal to the component resistance of the circuit
b. Very large compared to the component resistance of the circuit
c. Very small compared to the component resistance
d. Less than compared to the component resistance but not very small

ANSWER: Very large compared to the component resistance of the circuit

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