Q.

The figure here shows a portion of a circuit. What are the magnitude and direction of the current i in the lower right-hand wire

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a

6 A

b

8 A

c

7 A

d

2 A

answer is B.

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Detailed Solution

incoming current in the junction is (2+3+4+2) A 

and outgoing current is (1+2) A

According to KCL at the junction incoming current = outgoing current 

11=3+i 

i=8A out going

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