The Young modulus of the material of a wire is to be found. The Young modulus $E$ is given by the equation shown:
$E = \frac{4FL}{\pi d^2 x}$
The wire is extended by a known force, and the following measurements are made.
Which measurement has the largest effect on the uncertainty in the value of the calculated Young modulus?
1 )
A
B
3 )
C
4 )
D
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