Q.

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

Want to Fund your own JEE / NEET / Foundation preparation ??

Take the SCORE scholarship exam from home and compete for scholarships worth ₹1 crore!*
An Intiative by Sri Chaitanya

a

ln2a

b

ln4a

c

1a

d

2a

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
score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon