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)

According to Kirchhoff’s first law, At junction $A,i_{AB}=2+2=4A$
At junction $B,i_{BC}+1\Rightarrow i_{BC}=4-1=3A$
At junction $C,i_{BC}-1.3=3-1.3=1.7A$