A wire of cross-sectional area A is stretched horizontally between two clamps loaded at a distance 2 metres from each other. A weight w kg suspended from the mid point of the wire. The strain produced in the wire, (if the vertical distance through which the mid point of the wire moves down ) will be |
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a) |
b) |
c) |
d) |

A wire of cross-sectional area A is stretched horizontally between two clamps loaded at a distance 2 metres from each other. A weight w kg suspended from the mid point of the wire. The strain produced in the wire, (if the vertical distance through which the mid point of the wire moves down ) will be |
|||||||

a) |
b) |
c) |
d) |

1 Answer

127 votes

**(c)**

From figure the increase in length

= 2PR – PQ

=

=

= ( By Binomial theorem)

=

127 votes

127