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Kirchhoff's Loop Rule

27. Resistors & DC Circuits / Kirchhoff's Loop Rule / Problem 1

As shown in the figure, a circuit consists of two ideal electromotive force (emf) sources and eight resistors. When the current flows through the resistor "R", it produces heat at a rate of 3.0 W. Find i) the value for the emf (E) and ii) the value of the positive terminal of the unknown power source.

A

i) E = 0.75 V

ii) The positive terminal is connected to M

B

i) E = 1.15 V

ii) The positive terminal is connected to N

C

i) E = 3.25 V

ii) The positive terminal is connected to M

D

i) E = 12.5 V

ii) The positive terminal is connected to N

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