Question

Figure shows current in a part of an electrical circuit. Then current I is ______.

Options

• 2.5 A

• 2.1 A

• 0.5 A

• 1.5 A

Answer 1

Figure shows current in a part of an electrical circuit. Then current I is 2.5 A.

Explanation:

Using Kirchhoff’s junction rule at junction A,

2 + 5 - 2 - 1 + I_AB = 0 ; I_AB = -4 Amp

The current I_AB is directed away from the junction A.

Using the junction rule at B,

4 + 0.2 - 1.7 - I = 0

I = 2.5 Amp