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

Answer

**Step-by-Step Solution:**

1. **Understanding the Scenario**: When one end of an iron rod is heated, the other end becomes hot after some time. This indicates that heat is being transferred from the heated end to the cooler end of the rod.

2. **Identifying the Heat Source**: In this case, the heat is provided by a candle flame, which heats one end of the iron rod.

3. **Direction of Heat Flow**: Heat flows from the hotter end (the end being heated) to the cooler end (the end that is not being heated). This flow continues until thermal equilibrium is reached, meaning both ends of the rod are at the same temperature.

4. **Determining the Method of Heat Transfer**: The process by which heat is transferred in solids, such as an iron rod, is known as conduction. In conduction, heat is transferred through direct contact of particles within the solid material.

5. **Conclusion**: Therefore, the process by which heat flows in the iron rod is called conduction.

**Final Answer**: The process by which heat flows in the iron rod is conduction.

---