Question

For the given electrical arrangement, what is the value of current I?

• A. 6 A
• B. 5 A
• C. 7 A
• D. 8 A

Answer 1

Answer: (C)

7 A

Answer 2

The problem asks for the value of current $I$ in the given electrical arrangement. We can use Kirchhoff's Current Law (KCL) to solve this problem. KCL states that the algebraic sum of currents entering a junction is equal to the algebraic sum of currents leaving the junction.

Consider the junction where the current $I$ is flowing out. Two currents are entering this junction: a current of 3A from the wire above and a current of 4A from the wire below. The current $I$ is leaving this junction.

Applying Kirchhoff's Current Law at this junction:

Sum of currents entering = Sum of currents leaving

$3A + 4A = I$

$7A = I$

So, the value of current $I$ is 7A.