First slide

Kirchoff's Law

Question

The value of current ‘ i ‘ is :

Moderate

A

5A
B

7A
C

10A
D

12A

Solution

$L e t v o l t a g e a t C = x V \Rightarrow i_{1} + i_{2} = i \frac{\Rightarrow 30 - x}{2} + \frac{10 - x}{4} = \frac{x - 0}{2} (∵ i = \frac{Δ V}{R}) \Rightarrow x = 14 W e k n o w, \Rightarrow i = \frac{x - 0}{2} (∵ i = \frac{Δ V}{R}) \Rightarrow i = 7 A$

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