A rod is lying on the ground with both ends free. It has a length of 1m. Coefficient of linear expansion equal to 1.1*10^-5per °C. Calculate the strain when the change in temperature is 10K.(a) 11*10^-5(b) 1.1*10^-5(c) 0(d) 311.3*10^-5
Correct option is (c) 0To explain I would say: When the rod is heated it permanently increases in length. As there is no force holding it in its initial length from either side, there will be no internal forces to produce strain.
