The co-efficient of thermal expansion of a rod is temperature dependent and is given by the formula α=aT, where a is a positive constant and T in 0C. If the length of the rod is lat temperature 00C,then the temperature at which the length will be 2l is

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

ln2a

ln4a

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

expansion dl=lαdthere α=atdl=l at dtdll=atdt ∫l2ldll=∫0tatdt ln ll2l=at22 ln2=at22 ln4a=t2 t=ln4a

Watch 3-min video & get full concept clarity