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![[Post New]](/templates/default/images/icon_minipost_new.gif) 21 May 2008 23:37:48 IST
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Considerin the 2 cases separately,
H = V^2*T(1)/R(1)=V^2*T(2)/R(2)
So,we get?.
T(1) = H R(1)/ V^2
T(2) = H R(2)/ V^2
THUS, T(1) / T(2) = R(1)/ R(2) = 20/15 = 4/3
This implies R(1) = 4x, R2=3x
In series combination,
R(s) = R(1) + R(2)=7x
SO,H = V^2*T(s)/R(s)
Which gives T(s) = H R(s) / V^2
So,we get T(s) / T(1)= R(s) / R(1) = 7x/4x = 7/4
Thus, T(s) = (7/4)* T(1) = (7/4)*20 = 35
hope u get 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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