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29 Oct 2011 11:03:49 IST

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how to remember the dimensions of different quantities having same dimension because deriving costs

Physics

how to remember the dimensions of different quantities having same dimension because deriving costs a lot of seconds in competitive exams?

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Viraat Gupta

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Joined: 21 Jun 2011

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30 Oct 2011 14:01:56 IST

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just remember the general quantities's dimensions ... you cannot remember dimensions of all the quantities ... and to remember the general dimensions .. just write it down on a paper and revise them daily , it will hardly take 5-10 min ... and during practices also whenever you get along any quantity just try to remember its dimensions at that time only ....

Anand Sontakke

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Joined: 23 Jan 2012

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23 Jan 2012 23:32:36 IST

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See there are not much more quantities to remember Dimension of.

But still you can fallow unit of that quantities to write dimensions.

Example: Electric Intensity

unit is N/C

Newton per coulomb

You know about dimensions of Force (newton)

now Current = charge/ time

therefore coulomb has dimension [ I T] = charge = current x time

yes you do it withinn fraction of second mentally

cause it involve only observation and rearrangement

Force/ coulomb = [ M L T-2] [ I T ]-1

= [ M L T I-1 ]

got it

Don okes

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Joined: 27 Jan 2012

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27 Jan 2012 17:59:03 IST

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What is the general formula for calculating on electrolysis

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