Kirchhoff's Loop Rule Video Lessons

Concept

# Problem: For the circuit shown in Fig. let R1 = 5 Ω, R2 = 15 Ω, R3 = 10 Ω, ε1  = 60 V, ε2 = 80 V, ε3 = 10 V and I1 = 2A. Find the value of the current I2 in the circuita. 4 Ab. 2 Ac. - 2 Ad. - 1 A

###### FREE Expert Solution

We're going to use Kirchhoff's loop rule, which is:

$\overline{){\mathbf{\Sigma }}{\mathbf{V}}{\mathbf{=}}{\mathbf{0}}}$

We'll also use Ohm's law to help get the voltages.

From Ohm's law:

$\overline{){\mathbf{V}}{\mathbf{=}}{\mathbf{i}}{\mathbf{R}}}$, where i is the current and R resistance.

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###### Problem Details

For the circuit shown in Fig. let R1 = 5 Ω, R2 = 15 Ω, R3 = 10 Ω, ε1  = 60 V, ε2 = 80 V, ε3 = 10 V and I1 = 2A. Find the value of the current I2 in the circuit

a. 4 A

b. 2 A

c. - 2 A

d. - 1 A