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![[Post New]](/templates/default/images/icon_minipost_new.gif) 21 May 2008 00:36:17 IST
Accepted Answer [?]
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as to which formula is to be used,i think the problem is arising because u r considerin dat current flowin thru the coils in each case is same....which is not the case ,as the resistances are different,so whn connected across the same voltage,they will have diffrnt values of current flowing across different combinations....
here,as we are connecting the diffrnt combinations of resistances to the same potential difference,that is ,voltage,we have to use the formula H=V^2/R T as in this case, we hv to deal wd only one variable term,theresistance,while the voltage value remains const.....
bt in d othr formula,we hv both I and R which both vary in diffrnt cases,so it shud nt b used...
hope u gt it...
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"Many of the things you can count,dont count....
Many of the things you cant count,really do count...."-Albert Einstein
"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them"-William Bragg
"An inexplicable fact is infinitely preferable to an incomprehensible mystery"-F. Soddy
RISHIPRATIM MAZUMDAR
NIT DURGAPUR
1ST YEAR,ELECTRONICS AND COMMUNICATIONS
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