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Standard XII
Physics
Longitudinal Strain
Question

A steel wire 2 m long is suspended from the ceiling. When a mass is hung at its lower end, the increase in length recorded is 1 cm. Determine the strain in the wire.
  1. 5×10−3
  2. 65×10−3
  3. 6×10−3
  4. 7×10−3

A
6×10−3
B
5×10−3
C
65×10−3
D
7×10−3
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Solution
Verified by Toppr

Strain=△LL=0.01m2m
=0.01×0.5
=0.005
=5×10−3

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A steel wire 2 m long is suspended from the ceiling. When a mass is hung at its lower end, the increase in length recorded is 1 cm. Determine the strain in the wire.
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Q2
A steel wire 2 m long is suspended from the ceiling. When a mass is hung at its lower end, the increase in length recorded is 1 cm. Determine the strain in the wire.
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A light rod of length 2.00 m is suspended from the ceiling horizontally by means of two vertical wires of equal length tied to its ends. One of the wires is made of steel of cross-section 10−3 m2 and the other is of brass of cross-section 2×10−3 m2. Find out the position along the rod at which a weight may be hung to produce equal stress in both the wires.

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