Question

Q8. Distinguish between:
i) Conduction and Convection
ii) Conductors and Insulators​

Answer 1

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Answer 2

Answer:

i) Key Differences Between Conduction, Convection and Radiation

The substantial differences between conduction, convection and radiation are explained as under:

Conduction is a process in which heat is transported between parts of a continuum, through direct physical contact. Convection is the principle, wherein heat is transmitted by currents in a fluid, i.e. liquid or gas. Radiation is the heat transfer mechanism, in which the transition takes place through electromagnetic waves.

Conduction shows, how heat is transferred between objects in direct contact, but Convection reflects how heat travels through liquids and gases. As against this, radiation indicates how heat travels through places having no molecules.

Conduction takes place as a result of the difference in temperature, i.e. heat streams from high-temperature area to low temperature area. Convection happens due to the variation in density, such that the heat moves from low-density region to high-density region. On the contrary, all object release heat, having a temperature more than 0 K.

ii) Key Differences Between Conductor and Insulator

The conductor is the type of material which allows the electric current or heat to pass through it whereas the insulator does not allow the electric current or heat to pass through it.

The electric field exists only on the surface of the conductor, and it remains zero inside the conductor whereas it does not exist on an insulator.

The conductor, when placed in a magnetic field do not store energy whereas the insulator stored energy in a magnetic field.

Explanation:

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