CH1991 said:Homework Statement
Please check attachment or picture below
http://i.imgur.com/7Op7H.png
Homework Equations
KVL, KCL
The Attempt at a Solution
I try to solve KVL and KCL equations. I didn't get any of answer above. Can I say I1 = -I2?
Thanks!
Yes, you can use negative values for currents when solving KVL (Kirchhoff's Voltage Law) and KCL (Kirchhoff's Current Law) equations. In fact, it is often necessary to use negative values in order to accurately represent the direction and magnitude of currents in a circuit.
The direction of currents in a circuit can be determined by using the passive sign convention, which states that current flows from a higher potential to a lower potential. In other words, currents flow from the positive terminal of a voltage source to the negative terminal.
Yes, you can rearrange the terms in a KVL or KCL equation as long as you maintain the correct signs and direction of the currents. This is because KVL and KCL are based on the principle of conservation of energy and charge, so the sum of all voltage drops and currents entering and leaving a node must be equal to zero.
KVL and KCL are both laws that are used to analyze circuits, but they have different applications. KVL is used to analyze loops in a circuit and states that the sum of all voltage drops in a closed loop must be equal to the sum of all voltage sources in that loop. KCL, on the other hand, is used to analyze nodes in a circuit and states that the sum of all currents entering and leaving a node must be equal to zero.
KVL and KCL are fundamental laws in circuit analysis, and they can be used to solve any circuit as long as the circuit is linear and does not contain any reactive elements such as capacitors or inductors. Non-linear circuits require more advanced techniques to solve, but KVL and KCL can still be used to analyze specific parts of the circuit.
