A rod of original length L_(1) changes its temperature from T_(2) to T_(2). If alpha is temperature coefficient of linear expansion and L_(2) is length of temperature T_(2). Choose the correct options(s).

A rod of original length L_(1) changes its temperature from T_(2) to T

1.	A rod of original length L_(1) changes its temperature from T_(2) to T_(2). If alpha is temperature coefficient of linear expansion and L_(2) is length of temperature T_(2). Choose the correct options(s).
Answer» `L_(2) = L_(1) [1+ALPHA (T_(2) - T_(1) ) ]`, where `T_(2) - T_(1) and alpha` are not large `L_(2) = L_(1) e^( alpha (T_(2) -T_(1) ) )`, where `alpha` is CONSTANT `L_(2) = L_(1) e^( int_(T_1)^(T_2)alpha d T) `, where `alpha` is a function of temperature Formula in option (a) is valid in all conditions Answer :A::B::C