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![[Post New]](/templates/default/images/icon_minipost_new.gif) 1 Feb 2008 21:41:43 IST
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Hi guyz, I got ma practicals tomorrow n i had dese doubts. generally, wich has greater emf, leclanche or daniel? also y do we use color codes 4 carbon resistors? y cant we just write the value of resistance on the resistors?
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about your first qs........i know that......
leclanche's cell has a better emf or voltage........wahtever u might call it.........
1.5 volts.........
and daniel cell has that of 1.1 volts........
i'll prefer leclanche's cell anyday also becoz of its
higher ohmic resistance which is a great asset for various uses......
especially for us enginneering........
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" the only thing thats always constant in this world , is change itself.....
so it is better to adapt to the situation or life makes you adapt to it (painfully)..."
- Kundan a.k.a Juan dankh......
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1 Feb 2008 22:24:32 IST
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arre yaar..............
would you want to use a lens everytime you want to see a value on a resistor??????????
c'mon.........its done because look how small the resistor is......
a colour coding means clear viewing........you can view it from any side.......360degree view........
and its abrasion resistance........its about clarity yaar.......
haven't u seen it being used for
resistors
capacitors
inductors...........and god knows what else.....
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" the only thing thats always constant in this world , is change itself.....
so it is better to adapt to the situation or life makes you adapt to it (painfully)..."
- Kundan a.k.a Juan dankh......
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1 Feb 2008 22:24:52 IST
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oh and best of luck for ur exam.......
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" the only thing thats always constant in this world , is change itself.....
so it is better to adapt to the situation or life makes you adapt to it (painfully)..."
- Kundan a.k.a Juan dankh......
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1 Feb 2008 22:35:39 IST
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colour code is used so that u dont have to write different values on all the resistors like 300 or 2000 or 157000 etc. which have different number of digits also.
so to maintain uniformity, we use 4 color bands, 3 for numbers which r calculated from BBROYGBVGW and 4th band tells the tolerance (+- how many % of value)..
3rd band is also called multiplier band since that many zeroes have to be added.
thus using just 4 bands we can write all values.
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* Agent 'G' [sniper] - SD-6 (Alliance of Twelve)
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