Heat Transfer - Practice Questions & MCQ

Heat transfer is the process of transfer of heat from high temperature reservoir to low temperature reservoir. In terms of the thermodynamic system, heat transfer is the movement of heat across the boundary of the system due to temperature difference between the system and the surroundings.

There are three modes of heat transfer which is described below - 

1. CONDUCTION - The process of transmission of heat energy in which the heat is transferred from one particle to other particle      without dislocation of the particle from their equilibrium position is called conduction. 

2. CONVECTION - In this transfer of heat is by means of migration of material particles of medium is called convection. So, convection is the combination of conduction and advection. So, advection is the bulk flow of the particle. It is generally happens in fluids (liquid and gases)

3. RADIATION The process of the transfer of heat from one place to another place without need of medium is called radiation. So, radiation does not need any material medium to propogate. It is generally effective when a body is much higher temperature than the surroundings. In this the heat transfer is directly proportional to the fourth power of the absolute temperature.