ECE 110/Spring 2025/Test 2

This page contains the list of topics for ECE 110 Test 2. Post questions or requests for clarification to Ed. Note: In Spring of 2024 we did not discuss Bode plots - any problem you see on a previous test that refers to a Bode plot will not be part of your test. Also, while the frequency domain is certainly on the test, filter design will be on the final exam and not on test 2.

Test II Spring 2025 Coverage

While the test is necessarily cumulative, the focus will be on the topics below.

1. Superposition - be able to efficiently solve circuit problems by using superposition.
   • In life, remember that dependent sources must be included in the different subdivisions of a superposition problem regardless of the independent source or sources you leave on. On the test however, the superposition problem -- if there is one -- will not have a dependent source.
2. Thévenin and Norton Equivalent Circuits - be able to solve for the source and resistance of a Thévenin or Norton Equivalent Circuit for a circuit comprised of resistors and 0 or more each of independent and dependent sources. Be able to draw both Thévenin and Norton Equivalent Circuits. Be able to use Thévenin and Norton Equivalent Circuits to determine the maximum power delivered to a load and the required resistance of that load to receive the maximum power. Remember that if there are controlled sources requiring unknown currents or voltages to be solved, those currents or voltages may be different when finding $$v_{oc}$$ versus $$i_{sc}$$.
3. Reactive elements (Capacitors and Inductors)
   1. Know the main model equation relating voltage and current and what it means for the voltage across a capacitor or the current through an inductor
4. Be able to find equivalent capacitance for a network of capacitors and equivalent inductance for a network of inductors
   1. Know the equation for energy stored in a capacitor or an inductor. Note that if you use superposition to find the capacitor voltage or inductor current, you must wait until the end of the superposition process, when you have the total voltage or current, to find the energy stored.
   2. Be able to represent a circuit with reactive elements in the DC Steady State
   3. Be able to determine a model equation for circuits comprised of R, C, and sources or R, L, and sources
5. DC Switched circuits / constant source circuits
   1. Determine conditions just before something changes, just after something changes, and as time goes to infinity given piecewise constant forcing functions
   2. Set up and solve a first-order differential equation with initial conditions and constant forcing functions
   3. Accurately sketch the solution to switched circuit / constant source circuit

Specifically Not On The Test

1. Complex numbers
2. Sinusoids / ACSS
3. Phasors