Questions
An iron bar whose cross sectional area is 4cm2 is heated from 0°C and 100°C. The force required to prevent the expansion of the rod
is [Y of Iron = 2 × 1012 dyne / cm2 α of Iron = 2 × 10-6 /°C]
detailed solution
Correct option is D
Δ=FlAY …(1)Increase in length Δ=laΔt …(2)from (1) and (2) FlAY=laΔt⇒F=YAaΔTTalk to our academic expert!
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