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Using Kirchhoff's Current Law, if three currents enter a junction as 2A, 3A, and

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Question: Using Kirchhoff\'s Current Law, if three currents enter a junction as 2A, 3A, and I, what is the value of I if the total current leaving the junction is 5A?

Options:

  1. 0A
  2. 1A
  3. 2A
  4. 3A

Correct Answer: 1A

Solution:

According to KCL, I = total entering - total leaving = (2A + 3A) - 5A = 0A.

Using Kirchhoff's Current Law, if three currents enter a junction as 2A, 3A, and

Practice Questions

Q1
Using Kirchhoff's Current Law, if three currents enter a junction as 2A, 3A, and I, what is the value of I if the total current leaving the junction is 5A?
  1. 0A
  2. 1A
  3. 2A
  4. 3A

Questions & Step-by-Step Solutions

Using Kirchhoff's Current Law, if three currents enter a junction as 2A, 3A, and I, what is the value of I if the total current leaving the junction is 5A?
  • Step 1: Identify the currents entering the junction. We have three currents: 2A, 3A, and I.
  • Step 2: Calculate the total current entering the junction. Add the known currents: 2A + 3A = 5A.
  • Step 3: Identify the total current leaving the junction. It is given as 5A.
  • Step 4: Apply Kirchhoff's Current Law (KCL), which states that the total current entering a junction equals the total current leaving the junction.
  • Step 5: Set up the equation: total entering = total leaving. This means 5A (from Step 2) + I = 5A (from Step 3).
  • Step 6: Solve for I: I = 5A - 5A = 0A.
  • Kirchhoff's Current Law (KCL) – KCL states that the total current entering a junction must equal the total current leaving the junction.
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