For the circuit shown all resistors are 1kΩ.

For the circuit shown:

For the circuit shown (note this is case
3 of the Thevenin Theorem):

For the circuit shown:

For each circuit find the voltage, v(t), at the output
terminals if:
The resistor has value=R, and the capacitor has value=C. 
For the two circuits of the previous problem,
with R=1kΩ, C=1uF:

For the circuit shown find v_{x}(t) if:
R1=R2=R3=1kΩ, C=1uF. 
Solve for the two cases given.

For the circuit shown

If the voltage (or any other quantity) in a first order system starts at v(0^{+}) and ends at v(∞), show that the time time, t_{1}, at which it reaches the voltage v_{1} (i.e., v(t_{1})=v_{1}) is given by: 
For the circuit shown:

For the circuit shown:

The circuit shown is a Wheatstone bridge, and is
often use to measure small changes in resistance (denoted by the
lowercase "r").

For the circuit shown:

The resistor network shown repeats forever to the
right. What is the equivalent seen between A and B?
All resistors are equal with resistance R.
Hint: The resistance to the right of A/B is the same as the resistance to the right of C/D. 
Most newer electronic products say they are ROHS compliant. What does this mean and why is ROHS compliance important environmentally? Why is it important for a company's product to be ROHS compliant? 