Does this diagram illustrate sinking and sourcing supplies? My text uses conventional current supply and states that:
1.5.3 A S S O C I A T E D V A R I A B L E S C O N V E N T I O N
Equation 1.4 implies a specific relation between reference directions chosen for
voltage and current.
Definition of terminal variables v and i for the resistor that defines the positive flow of current (flow of positive charge) is directed in at the resistor terminal assigned to be positive in voltage. This convention, referred to as associated variables, is generalized to an arbitrary element in Figure 1.20 and will be followed whenever possible in this text. The variables v and i are called the terminal variables for the element. Note that the values of each of these variables may be positive or negative depending on the actual direction of current flow or the actual polarity of the voltage.
Definition of the terminal variables v and i for a two-terminal element under the associated variables convention.
Associated Variables Convention Define current to flow in at the device terminal assigned to be positive in voltage.
From this I understand that current flows from the more positive to the negative. When looking at the diagram below, the top rail would be the more positive in relation to the bottom rail that has been grounded.
1. What would prevent both sources from flowing to the top?
2. Why was the 2A supply chosen when the 10A is a higher source?
The example gives an answer of 2A + (7-0)/1Ω + (7-0)/7Ω - 10 = 0 satisfying KCL .
As always, thanks in advance!
1.5.3 A S S O C I A T E D V A R I A B L E S C O N V E N T I O N
Equation 1.4 implies a specific relation between reference directions chosen for
voltage and current.
Definition of terminal variables v and i for the resistor that defines the positive flow of current (flow of positive charge) is directed in at the resistor terminal assigned to be positive in voltage. This convention, referred to as associated variables, is generalized to an arbitrary element in Figure 1.20 and will be followed whenever possible in this text. The variables v and i are called the terminal variables for the element. Note that the values of each of these variables may be positive or negative depending on the actual direction of current flow or the actual polarity of the voltage.
Definition of the terminal variables v and i for a two-terminal element under the associated variables convention.
Associated Variables Convention Define current to flow in at the device terminal assigned to be positive in voltage.
From this I understand that current flows from the more positive to the negative. When looking at the diagram below, the top rail would be the more positive in relation to the bottom rail that has been grounded.
1. What would prevent both sources from flowing to the top?
2. Why was the 2A supply chosen when the 10A is a higher source?
The example gives an answer of 2A + (7-0)/1Ω + (7-0)/7Ω - 10 = 0 satisfying KCL .
As always, thanks in advance!