A) \[-30{{I}_{1}}-41{{I}_{3}}+45=0\,\,and\,-30A{{I}_{1}}\] \[+21{{I}_{2}}-80=0\]
B) \[30{{I}_{1}}-41{{I}_{3}}+45=0\,\,and\]\[30{{I}_{1}}-21{{I}_{2}}-80=0\]
C) \[30{{I}_{1}}+41{{I}_{3}}-45=0\,\,and\,\]\[-30{{I}_{1}}+21{{I}_{3}}+80=0\,\,\]
D) None of the above
Correct Answer: D
Solution :
Applying Kirchhoffs loop rule for the closed loop AHDCBA \[-30{{I}_{1}}-45-40{{I}_{3}}-{{I}_{3}}=0\] \[-30{{I}_{1}}-45-41{{I}_{3}}=0\] Applying Kirchhoffs loop rule for closed loop AHDEFGA \[-30{{I}_{1}}+20{{I}_{2}}+{{I}_{2}}-80=0\] \[-30{{I}_{1}}+21{{I}_{2}}-80=0\] So, option is correct.You need to login to perform this action.
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