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10 April, 17:33

One of the checks that you could do for problem 1) would be to check the output resistance of the Wheatstone bridge to make sure the bridge is not damaged. With no power connected to the bridge, you connect anOhmmeter to the outputpins. If each arm (branch) of the Wheatstone Bridge is 350Ω, what should the resistance read and why? (Draw the circuit and show your calculations.)

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  1. 10 April, 19:06
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    Let the four resistances of th wheat stone bridge is

    P, Q, R and S and the value of each is 350 ohm.

    Here, P and Q are in series.

    R' = P + Q = 350 + 350 = 700 ohm

    Then R and S are in series

    R' = R + S = 350 + 350 = 700 ohm

    Now R' and R'' are in parallel.

    So, the equivalent resistance is

    Req = R' x R'' / (R' + R'')

    Req = 700 / 2 = 350 ohm

    Thus, the reading of ohmmeter is 350 ohm.
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