Question

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The question was to find the error in youngs modulus...I have the solution..
see pls tell why in the solution only deltaL/L is taken not the other dimensions like force and area to take out the error in youngs modulus!!!???
Pls and..

Answer 1

This Experiment is to find the error in Young's Modulus, of wire.

Hope, you know Expermint well.

Here, we are taken the Force acting on mass which is suspended on wire as constant, that is
It cant be changed.
We took the error in Force as Zero, as we measured directly by some accurate ecperiment.

So, Delta (F) = 0

And too we are taking the cross section of wire as errorless.
We never changes the area of cross section in whole experiment unless we are doing the same experiment many times with diff cross section.



It is clearly mentioned as Experiment sole aim is to measure only the change in length of wire.