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Vaibhav Garg
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PostSubject: help Sun Feb 08, 2009 9:45 pm

y is the current not kept high during the verification of ohm's law??
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Vaibhav Garg
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PostSubject: Re: help Mon Feb 09, 2009 7:49 pm

some1 plzz answer....
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Candy
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PostSubject: Re: help Mon Feb 09, 2009 7:52 pm

Even I had the same doubt
I am going to my teacher on Wednesday to ask doubts so you'll get the answer on Wednesday from me
plzzzzzzzzz bear up with me
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Vaibhav Garg
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PostSubject: Re: help Wed Feb 11, 2009 3:34 pm

its wednesday mam...
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ambili
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PostSubject: Re: help Wed Feb 11, 2009 3:53 pm

come on candy,we r waiting 4 u........ bounce
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siya
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PostSubject: Re: help Wed Feb 11, 2009 4:29 pm

ya,me 2 in d waitin list!!!!!!!!
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Aanchal
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PostSubject: Re: help Wed Feb 11, 2009 4:33 pm

d answer is reali simple..........
if d current increses, then d temperature of d conductor wud chng !

n 4 d verification of ohmz law ....d temperature of d conductor should be constant !


Last edited by Aanchal on Wed Feb 11, 2009 4:38 pm; edited 1 time in total
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Aanchal
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PostSubject: Re: help Wed Feb 11, 2009 4:35 pm

Very Happy

Last edited by Aanchal on Wed Feb 11, 2009 4:40 pm; edited 1 time in total
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siya
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PostSubject: Re: help Wed Feb 11, 2009 4:37 pm

hey!!!!!! V is directly proportional 2 I na??????
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Aanchal
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PostSubject: Re: help Wed Feb 11, 2009 4:39 pm

c d correct answer !
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siya
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PostSubject: Re: help Wed Feb 11, 2009 4:40 pm

i cant find it.ok i will ask my teacher 2mrw n tell u all
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Aanchal
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PostSubject: Re: help Wed Feb 11, 2009 4:42 pm

but here is d rite answer !

if d current increses, then d temperature of d conductor wud chng !

n 4 d verification of ohmz law ....d temperature of d conductor should be constant !
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siya
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PostSubject: Re: help Wed Feb 11, 2009 4:45 pm

ya temp. sud b constant na.its not mentioned whether it sud b constantly high or cnstantly low.by high current temp. wud increase but if we take current 2 b high frm d startin,den temp. is constantly high.
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Aanchal
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PostSubject: Re: help Wed Feb 11, 2009 5:00 pm

ahh.....
iw ud give u an answr 2mrw............aftr askin mi mam.......
or mi dad ..........hez a lecturar.............plzzzzzzzz wait till 2mrw !
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Vaibhav Garg
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PostSubject: Re: help Wed Feb 11, 2009 7:01 pm

awesom thanx anchal
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siya
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PostSubject: Re: help Wed Feb 11, 2009 7:10 pm

i think by using high current more energy is wasted.n moreover it causes insulation difficulties.y 2waste so much energy???? wen d law can b verified by using low current.well it was just a guess..
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Vaibhav Garg
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PostSubject: Re: help Thu Feb 12, 2009 2:15 am

no i thnk anchal is ryt....
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Candy
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PostSubject: Re: help Thu Feb 12, 2009 10:51 am

Look at this !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Exclamation Exclamation Exclamation Exclamation Exclamation Exclamation
I am sorry I forgot about this post Crying or Very sad
Although I didn't read what the others wrote Crying or Very sad (As I don't have that much time to do so , I read Anchal's She's rite) I said I would Answer and HEre's the Answer: The reason is that High current. will affect the temp . Therefore the law cannot be verified\

SOOOOOOOOOOOOOORRRRRRRRRRRRRRRRYYYYYYYYYYYYYYYYYYYYYYY GUYS I love you I love you I love you I love you
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ambili
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PostSubject: Re: help Thu Feb 12, 2009 9:50 pm

thanx........
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vaish93
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PostSubject: Re: help Wed Feb 18, 2009 1:20 am

Hi there!
i have another Q...
could someone please give me the factors on wich the internal resistance of a cell depends?
the books i consulted have varied answers which make a huge difference Shocked Question
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Hari
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PostSubject: Re: help Wed Feb 18, 2009 11:42 am

hey vaish:

inversly proportional to surface area of electrodes in contact with electrolyte
directly propo to distance b/w electrodes
inv prop to concentration of electrolyte
if electrolyte highly ionised, r decreases and vice versa
direct prop to temprature

hope it helps...... Smile
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kanika rajput
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PostSubject: Re: help Wed Feb 18, 2009 12:56 pm

1)y is ......................a bulb filled vith argon gas??????

2)y is the tungsten coiled inside the.........................bulb...???????/
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Hari
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PostSubject: Re: help Wed Feb 18, 2009 1:13 pm

1.The filament lasts longer if there is gas in the bulb, because that slows
down the evaporation of the filament material. Heavier gases do it
better, which is why expensive bulbs use krypton, either for longer life
or to permit running the filament hotter with the same life. ordinary bulbs use argon

2.tungsten is coiled to provide more surface area.
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kanika rajput
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PostSubject: Re: help Wed Feb 18, 2009 1:17 pm

thnk u again hariiiii Happy flower flower
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vaish93
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PostSubject: Re: help Wed Feb 18, 2009 2:18 pm

To Hari,
Thanks a Lot ..... Very Happy Laughing rendeer
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