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![[Post New]](/templates/default/images/icon_minipost_new.gif) 9 May 2008 16:25:07 IST
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A cell supplies a current I1 through R1 & a current I2 through R2. The int resistance of the cell is
R2-R1
(I2+I1/I1-I2)/R1R2
I1R2-I2R1/I1-I2
I2R2-I1R1/I1-I2
ans is d
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9 May 2008 16:28:32 IST
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Terminal potential diff(T.P.D.) in case of I1= I1R1
Terminal potential diff in case of I2= I2R2
Now, E - Ir = T.P.D.
Where E= EMF, r= int resistance
E - I1r = I1R1
E - I2r= I2R2
Subtract the 2 equations to get r.
U will get the correct answer as d.
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