Author Topic: help with some physics core definition!  (Read 826 times)

Offline ayoubi

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help with some physics core definition!
« on: June 03, 2009, 10:12:51 am »
What is e.m.f?
what is the difference between:
Conduction
Convection
Radiation
 Thank you

Offline Shogun

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Re: help with some physics core definition!
« Reply #1 on: June 03, 2009, 10:17:25 am »
electro motive force (EMf) is the amount of force (voltage) needed to move unit chrage around the whole circuit is called emf.


all conduction conviction n radiation is a method to tranfer heat except tht.

conduction happens in solid, conviction in gasses and liquids, radiation in an emty place or vacum.

conduction needs medium, conviction needs medium (i.e gas inn  liquids). radiation happens by ,eams of electromagnetic wave (i.e no need of medium, as it can travel throght vaccum shuch as heat from sun traveling throu space to reach earth..)

conduction happens without the movement of the whole body of a solid, conviction happens with the movement of liqiud or gasses, radiation just travels through...

hope this helped ;D
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Offline Priceless

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Re: help with some physics core definition!
« Reply #2 on: June 03, 2009, 10:45:12 am »
thnkz shogun 4 da notes......+rep.....all da best 4 ur xam!!! ;)
Don't say "God I have tooo many problems" but say "Problems I have God!"   Gud Luck 2 all 4 xams. Hope v all du well.....fingers crossed LOL