Of the following the fastest process of heat transfer is

Explanation:

• Conduction involves the transfer of heat through a material by direct contact of particles. It is slower compared to radiation as particles need to vibrate and pass energy to adjacent ones.
• Convection is the transfer of heat through a fluid (liquid or gas) by the movement of the fluid itself. While faster than conduction, it still requires a medium to transfer heat.
• Radiation is the transfer of heat through electromagnetic waves (such as infrared radiation). It does not require a medium and can transfer heat at the speed of light, making it the fastest process.
• Conduction through a silver rod is an example of conduction, and while silver is a good conductor, it is still slower than radiation.