Unbalanced Wheatstone Bridge
With an unbalanced bridge initially Vout ≠ 0v
The unbalanced bridge is used to find an unknown resistance. If RX is unknown and RV is a variable resistor, adjust RV until the bridge is balanced as indicated by a zero output voltage.
The unbalanced bridge is used to measure some transducer quantities, such as strain, temperature, or pressure.
The Vout value represents the change in the transducer quantity.
It is calculated using the voltage-divider formula in each branch of the bridge:
The unbalanced bridge is used to find an unknown resistance. If RX is unknown and RV is a variable resistor, adjust RV until the bridge is balanced as indicated by a zero output voltage.
The unbalanced bridge is used to measure some transducer quantities, such as strain, temperature, or pressure.
The Vout value represents the change in the transducer quantity.
It is calculated using the voltage-divider formula in each branch of the bridge:
Example:
An unbalanced Wheatstone Bridge Circuit is shown:
If the voltage source, Vs, is 100 V,
Calculate the output voltage, Vout, across points A and B.
Solution:
If the voltage source, Vs, is 100 V,
Calculate the output voltage, Vout, across points A and B.
Solution: