2057

Physics Current Electricity Level: High School

Kirchoff's Law

Four wires meet at a junction . The first carries 4 A into the junction, the second carries 5 A out of the junction , and the third carries 2 A out of the junction , the fourth carries ?

a) 7 A out of the junction

b) 7 A into the junction

c) 3 A out of the junction.

d) 3 A into the junction.

e) 1 A into the junction.