Circuit Theorems and Conversions Questions

• Referring to the given circuit, the voltage and current for the load resistor, RL, is
• A 12 V source has an internal resistance of 90 Ω. If a load resistance of 20 Ω is connected to the voltage source, the load power, PL, is
• What is the Thevenin equivalent (VTH and RTH) for the circuit given?
• In a two-source circuit, one source acting alone produces 12 mA through a given branch. The other source acting alone produces 10 mA in the opposite direction through the same branch. The actual current through the branch is
• Referring to the given circuit, determine VTH and RTH if a 68 Ω resistor is connected in parallel across R2 and R3.
• A practical voltage source has a nonzero internal resistance.
• Some circuits require more than one voltage or current source.
• You cannot convert a voltage source to an equivalent current source, or vice versa.
• Transistors act basically as voltage sources.
• Norton's equivalent current (IN) is an open-circuit current between two points in a circuit.
• Conversions between delta-type and wye-type circuit arrangements are useful in certain specialized applications.
• An ideal current source has zero internal resistance.
• An ideal voltage source has zero internal resistance.
• A practical current source has a finite internal resistance.
• The Thevenin equivalent voltage (VTH) is the short-circuit voltage between two terminals in a circuit.