Practise MYP Physics questions on 2.6 Heat Transfer and review the explanations to check your understanding.
Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.
In the proportionality for the rate of conduction, , what does the term represent physically?
Why does the example of diamond being an excellent thermal conductor but a poor electrical conductor serve as an important note in the study of heat transfer?
When considering the design of a cooling system for an electronics cabinet, why are cooling fans often positioned to create a flow of air across the components?
In the 'conveyor belt' analogy for a convection cell, which part of the process represents the 'loading' of thermal energy?
For a fluid to create a convection current, what must happen to its density as its temperature increases?
The latent heat of the substance
The luminosity of the emitting surface
The level of insulation efficiency
The length or thickness of the material through which heat travels
It proves that all insulators are actually good conductors
It suggests that diamond is a metal under high temperature conditions
It demonstrates that the link between electrical and thermal conductivity does not reliably apply to non-metals
It shows that free electrons are the only way to conduct heat
To increase the rate of conduction through the air
To increase the rate of convection by moving fluid particles
To increase the rate of radiation from the components
To eliminate the need for thermal insulation
The cooling of the fluid at a distance from the source
The sinking of cool, dense fluid
The bulk movement of the fluid from one region to another
The heating of the fluid at the source
The density must remain constant while the mass increases
The density must decrease so the fluid can sink
The density must decrease so the fluid can rise
The density must increase so the fluid can rise
