A multiloop circuit is shown in the figure It is not necessa

A multiloop circuit is shown in the figure. It is not necessary to solve the entire circuit. Compared to the polarity shown in the figure, the emf epsilon 1 is closest to A) -5 V. B) 5 V. C) 45 V. D) 51 V. E) -51 V.

Solution

Apply Kirchoff\'s second law to \"dfged\" loop you get ,

E1-20 = -5A(5 ohm)

         = -25

     E1 = -25 +20

          = -5 V