# can you please explain poisson's ratio with formula and how it is actually to be applied?

### Asked by devyani.gauri99 | 28th Dec, 2015, 09:40: PM

Expert Answer:

### Poisson's ratio is given as
When a deforming force is applied at the free ends of a suspended wire of radius R and length l, then the radius of the wire decreases by dR and its length increases by dl. So, a single force produces two types of strains:
Thus,
The negative sign shows that if the length of the wire increases, then the radius decreases.

### Answered by Yashvanti Jain | 29th Dec, 2015, 11:14: AM

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