Engineering Board Exam Reviewer · Cramer's Rule and Linear Systems · medium

In a two-loop circuit the mesh equations are 6I1-2I2=10 and -2I1+5I2=0 (volts, amperes). Find I1.

  1. 1.67 A
  2. 2 A
  3. 1.92 A
  4. 0.77 A

Answer

C. 1.92 A

Solution

D= vmatrix6&-2\-2&5 vmatrix=26 and D1= vmatrix10&-2\0&5 vmatrix=50. So I1=50/26 1.92 A.

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