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As shown in the figure, in an experiment...

As shown in the figure, in an experiment to determine Young's modulus of a wire, the extension-load curve is plotted. The curve is a straight line passing through the origin and makes an angle of `45^@` with the load axis. The length of wire is` 62.8 cm` and its diameter is `4 mm.` The young's modulus is found to be ` x × 10^4 Nm^(–2)` . The value of x is ........

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