What are the magnitude and direction of the current in the 1

What are the magnitude and direction of the current in the 10ohm resistor?

Solution

Assume the current is moving clockwise. Then use Kirchhoff\'s second rule:

9 - I(10 ohm) + 18 = 0

27 = I (10 ohm)

I = 2.7 A

The assumption that the current is moving clockwise is incorrect and the current is moving clockwise