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Alexeev081 [22]

3 years ago

12

Wire A carries 4 A into a junction, wire B carries 5 A into the same junction, and another wire is connected to the junction. Wh

at is the current in this last wire?

1 answer:

nydimaria [60]3 years ago

7 0

Answer:9A

Explanation:

let the last wire be wire C

According to Kirchhoff's rule

the sum of all currents entering a junction must be equal to the sum of all currents leaving a junction

Ic=Ia+Ib

Ic= 4+5

Ic=9A

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Using the Newton second law;

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From trigonometry rule:

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