Sd292 Asg1b

SYDE 292

Sample Exam Questions #1B

Questions: 1. For the circuit shown below at left, find the value of R` such that the complete circuit has an equivalent resistance R. By what percentage is the voltage drop across the resistor R decreased by the inclusion of the R` resistors?

2. For the voltage source shown above at right, with source resistance Rs, find the load resistance (as a function of Rs) which results in maximum power disiation across the load. (Note: P = i2 RL ) 3. In the circuit shown below at left, use the superposition principle to find the current I1 through the 10 Ω resistor as a function of V1 and V2. If V1 = 10V and V2 = 5V, what is the partial current in the 10Ω resistor due to each source?

4. What is the Thevenin equivalent circuit for the circuit shown above at right? If a resistor equal to the Thevenin equivalent reistance is place across A and B, what power is the 20V source providing?