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The figure shows a network of currents. The magnitude of currents is shown here. The current I will be 

(a) -3A

(b) 3A

(c) 13A

(d) 20A

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Correct option(d)

Explanation:

According to Kirchhoff’s Ist law

  I = 7A + 13 A 

 I = 20 A

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