A copper wire 8 cm long is stretched to produce an extension of 0.8 cm in it. The lateral strain produced in the wire is , (if `sigma` of copper is 0.2)

Options

A. 0.002
B. 0.02
C. 0.2
D. 2

Answer

B

Explanation

`sigma=("lateral contraction strain")/("logitudinal elongation strain")`
`therefore` Lateral contraction strain `=0.2 xx (0.8)/(8) =0.02`.