The coefficient of linear expansion α of the material of a rod of length ℓ 0 varies with absolute temperature as α = aT − bT^2 where a & b are constants. The linear expansion of the rod when heated from T1 to T2 = 2T1 is A difference of temperature of 25^∘C is equivalent to a difference of. September 11, 2021 Category: Chapter 14 - Thermometry, Expansion and KTG , MTG NEET Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related