Apply the loop rule to loop abcdefgha (going clockwise) in the figure below, using the direction of the
currents as shown on the figure.
Write your expression using the following symbols for the emf, currents and resistances: E1 for E1, E2 for
E2, I1 for I1, I2 for I2, I3 for I3, R1 for R1, R2 for R2, R3 for R3, r1 for r₁, r2 for r2, and r3 for r3.
$E_1 = 18 V$
$R_2 = 2.5 \Omega$
$R_1 = 6.0 \Omega$
$R_3 = 1.5 \Omega$
$E_2 = 45 V$
$\sum V = E1-I2R2-I2r1-I3R3-I3r2+E2 = 0$
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