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Two resistance r1 = (100.0+- 0.3) ohm an...

Two resistance `r_1 = (100.0+- 0.3) ohm and r_2 = (150.0+- 0.5)` ohm are connected in series. Calculate the combined resistance with error limits.

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The correct Answer is:
(250.0+-0.8) ohm`
`R_s =r_1 +r_2, Delta R_s = (Deltar_1 = Delta r_2)`
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