ELEC 101

Prof. Rich Kozick

Spring, 1998

Prof. Rich Kozick

Spring, 1998

**Date Assigned:** Monday, February 23, 1998

**Date Due:** Friday, February 27, 1998

**Note:**
This HTML file is incomplete since the circuit diagrams are not included.
Please get a paper copy of the assignment.

- 1.
- Suppose you have a real (non-ideal) voltage source with 10 ohm
internal resistance, as shown below.
The source is used to light a bulb, as shown.
- (a)
- What value of resistance should the bulb have in order for it to shine as brightly as possible?
- (b)
- How much power is dissipated by the bulb when its resistance has the value you specified in part (a)?
- (c)
- How much power is dissipated by the bulb when it has resistance 1 ohm? What about 100 ohm?

[CIRCUIT DIAGRAM IS NOT AVAILABLE IN HTML DOCUMENT.] - 2.
- Please solve the following problem.

[PROBLEM STATEMEMT IS NOT AVAILABLE IN HTML DOCUMENT.] - 3.
- The voltage divider shown in circuit (A) below has been used
to convert an
*ideal*10 volt source into a 5 volt source. Please find the Thevenin model for circuit (A). That is, find*v*_{oc}and*R*in circuit (B) so that both circuits have the same voltage and current behavior at their terminals._{0}

[CIRCUIT DIAGRAM IS NOT AVAILABLE IN HTML DOCUMENT.] - 4.
- Suppose that a voltage source (also called a power supply)
is to be designed such that it provides 12 volts when its
terminals are open-circuited (nothing connected between them).
In addition, the voltage source must be able to provide
at least 70 watts of power to a load.
What is the
*maximum*value of*R*in the Thevenin model for this source?_{0}

(The load resistance*R*_{L}can be assumed to be matched to*R*for maximum power transfer.)_{0}