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

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Q. The figure below shows currents in a part of electric circuit. The current $i$ isPhysics Question Image

Current Electricity

Solution:

According to Kirchhoff's first law
At junction $A, i_{A B}=2+2=4 A$
At junction $B, i_{A B}=i_{B C}-1=3 A$
image
At junction $C, i=i_{B C}-1.3=3-1.3=1.7 A$