Question

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

• A. 1.7 amp
• B. 3.7 amp
• C. 1.3 amp
• D. 1 amp

Answer 1

Answer: (A)

1.7 amp

Answer 2

According to Kirchhoff's first law

At junction A, $i_{AB} = 2 + 2 = 4A$

At junction B, $i_{AB} = i_{BC} - 1 = 3A$

At junction C, $i = i_{BC} - 1.3 = 3 - 1.3 = 1.7amp$