First slide

Kcl

Question

The figure below shows currents in a part of electric circuit. The current i is

Easy

A

1.7 A
B

3.7 A
C

1.3 A
D

1 A

Solution

According to Kirchhoff's first law
At junction A, i_AB = 2 + 2 = 4A
At junction B, i_AB = i_BC - 1 = 34
At junction C, $i = i_{B C} - 1.3 = 3 - 1.3 = 1.7 A$

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