Why is convection not possible inside a solid metal rod when one end is heated?
PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
Why is convection not possible inside a solid metal rod when one end is heated?
(a) Because solids have very high density, the heated portion cannot rise upward to set up currents
(b) The presence of free electrons in metals carries the heat away, so bulk motion is unnecessary
(c) The atoms in a solid are fixed in a lattice and cannot take part in bulk motion
(d) The coefficient of thermal expansion of a solid is nearly zero, so temperature differences do not create density differences needed for convection