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## Homework Statement

An experiment is done to measure the resistance of a wire.

The current in the wire is [tex]1.0 \pm 0.2A[/tex] and the potential difference across the wire is [tex]8.0 \pm 0.4V[/tex].

What is the resistance of the wire and its uncertainty?

## Homework Equations

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## The Attempt at a Solution

[tex]\frac{0.2}{1.0} \times 100 = 20\%[/tex]

[tex]\frac{0.4}{8.0} \times 100 = 5\%[/tex]

Total Percentage Uncertainty = [tex]25\%[/tex]

How can I get the uncertainty?