I would like to know why the voltage source is not used in the equation as given in this image below.
In the image the equation is:
Why can't the equation be \$10-I1∙8Ω+I2∙4Ω=0\$ using KVL?
Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up.Sign up to join this community
Because your source is a current source, which means that it will provide as much voltage as needed until current is 10A. Therefore source voltage is not a provided variable in this circuit.
As Justin puts it in its comment, a current source uses a mechanism similar to an ammeter to watch the output current. If output current is below required value, then it increases the output voltage. If output current is above required value, then it decreases the voltage. In other words, voltage is regulated so current can be constant.