Chapter 34 of 2363 min read

Heat transfer: conduction, convection, radiation

Why this is asked: Radiation is the only one of the three heat-transfer modes that needs no medium at all — it's how the Sun's heat crosses vacuum — while conduction needs direct contact and convection needs actual bulk fluid movement.

This chapter is part of a paid pack

A sample of the book is free to read — the rest, including this chapter, unlocks with full access.

See pricing

Test yourself

•Three identical heat-conducting rods are connected in series as shown in the figure. The rods on the sides have thermal conductivity $2 K$ while that in the middle has thermal conductivity $K$ . The left end of the combination is maintained at temperature $3 T$ and the right end at $T$ . The rods are thermally insulated from outside. In steady state, the temperature at the left junction is $T_{1}$ and that at the right junction is $T_{2}$ . The ratio $T_{1} / T_{2}$ is:

Open this in the full syllabus view · Physics

ShareWhatsApp Telegram