In an experiment a sphere of aluminum of mass 0.20 kg is heated upto 15°C. Immediately, it is put into water o e, F is applied at the two ends of a long thin .steel rod. It is heated, simultaneously, such that its temperature increases by Delta T. The net change in its length is zero. Let l be the length of the rod, A its area of cross-section, Y is Young's modulus, and alpha its coefficient of linear expansion. Then, F is equal to:

In an experiment a sphere of aluminum of mass 0.20 kg is heated upto 1

1.	In an experiment a sphere of aluminum of mass 0.20 kg is heated upto 15°C. Immediately, it is put into water o e, F is applied at the two ends of a long thin .steel rod. It is heated, simultaneously, such that its temperature increases by Delta T. The net change in its length is zero. Let l be the length of the rod, A its area of cross-section, Y is Young's modulus, and alpha its coefficient of linear expansion. Then, F is equal to:
Answer» `( AY)/( alpha DELTA T)` `A Y alpha Delta T` `L^(2) Y alpha Delta T` `I "A Y" alpha Delta T` Answer :B