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Homework Help: Wheatstone Bridge question

  1. Dec 21, 2011 #1
    looking for some help for the second part of this question.

    i got 60 ohms for part one

    the answer to part 2 shows (delta v = 4.44mv) not sure how to calculate this or what is voltage resolution.


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    Last edited: Dec 21, 2011
  2. jcsd
  3. Dec 21, 2011 #2


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    Staff: Mentor

    If the sensor resistance changes to 60.1 ohms, what will be the voltage difference between A and B? The voltage detector (e.g, voltmeter) must be able to register this small voltage, otherwise the sensor won't be of any use for the intended purpose.
  4. Dec 21, 2011 #3


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    Homework Helper

    Starting with the balanced Bridge, (R3=60) calculate UAB when R4 changes by 0.1 ohm with respect to the nominal 60 ohm. Take care: the figure shows 15 V for the voltage of the battery, the text says 12 V, and you have to use this value.

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