A copper rod (initially) at room temperature 20⁰C of non-uniform cross-section is placed between a steam chamber at 100⁰C and ice-water chamber at 0⁰C. A and B are cross-sections as shown in figure. Match the statements given in column-I with results in column-II comparing only between cross-section A and B (heat transfer from column I to II)

 

	COLUMN – I		COLUMN – II
A)	Initially, rate of heat flow $\frac{\mathrm{dQ}}{\mathrm{dt}}$ will be	P)	Maximum at section A
B)	At steady state, rate of heat flow $\frac{\mathrm{dQ}}{\mathrm{dx}}$ will be	Q)	Maximum at section B
C)	At steady state, temperature gradient $\frac{\mathrm{dT}}{\mathrm{dx}}$ will be	R)	Minimum at section B
D)	At steady state, rate of change of temperature $\left(\frac{{\displaystyle \mathrm{dT}}}{{\displaystyle \mathrm{dt}}}\right)$	S)	Same for all sections