Question

A metallic rod ???? cm long, A square cm in cross-section is
heated through tºC. If Young’s modulus of elasticity of the
metal is E and the mean coefficient of linear expansion is α per
degree celsius, then the compressional force required to
prevent the rod from expanding along its length is
(a) E A α t (b) E A α t/(1 + αt)
(c) E A α t/(1 – α t) (d) E ???? α t

Answer 1

Answer:

sorry I don't know your answer

Answer 2

Answer:

ANSWER

Young

′

s modulus=stress/strain

i.e., E=

Δl/l

F/A

=

αt

F/A

⇒F=EAαt