Hello friends....in this questions the answer is (b) option.....this is from indian engg. services exam.(adsbygoogle = window.adsbygoogle || []).push({});

if we apply mesh in loop which i have shown , then we find that

I = (10 - 5 )/10 = 0.5 amp

V=10 - 6 I = 7 volt (right acc. to answer keys)

and Rth = 2.4 ohm (i have calculated Rth)

but if we apply Nodal analysis where V is marked then

acc to that

(V-10)/6=(V-5)/4

V= -5

so we see that both results are not equal....but in answer keys 7 volt is given....

please tell me what is the problem in second method of nodal analysis.? is this wrong ?

thanks in advance.....

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