Four pins (I, II, III, and IV) are fixed to a metallic rod with the help of wax. The rod is heated at one end. Which of the following pins would drop first?
In the arrangements A and B shown in Fig 4.7, pins P and Q are fixed to a metal loop and an iron rod with the help of wax. In which case are both the pins likely to fall at different times? Explain.
A rod is made of uniform material and has non-uniform cross section. It is fixed at both the ends as shown and heated at mid-section. Which of the following are not correct?
Two ends of rods of length L and radius R of the same material of kept at the same temperature. Which of the following rods conducts the maximum heat?
Arrange the following steps in sequential order ot show that the conduciton of heat is different in different conductors (a) take two identical rods one is copper and the other is iron (b) The ends of the two rods are heated with the same spirit lamp (c ) fix some nails on the rods with the help of wax at equal distances (d) The nails near to the flame first from the copper rod and then from the iron rod.
When one end of an iron rod is heated, its other end also becomes hot soon. Name the process by which heat flows in the iron rod
Two metal rods X and Y having equal cross-sectional areas are joined in series. One end of which is heated. After some time, the temperature gradient along each rod is foound to be uniform, but greater in X than that in Y. Which of the following can be inferred
