Consider the schematic of a passive filter shown in the figure. If C = 0.01 μF and the load resistor is 10 kΩ, what value of R would be needed to achieve a cut off frequency of 2100 Hz? Express your answer in Ohms, rounded to the nearest Ohm.

20. The male voice tends to be in a lower range than a female’s voice because men have

We want to design a bandpass filter of bandwidth 7.5 kHz with a cascaded low pass filter (LPF) and high pass filter (HPF). What should the cut-off frequencies of each filter be?  

A JFET can be used as a voltage-controlled resistor by adjusting the drain voltage.

Assuming the diode is ideal. After an “infinite” amount of time, what is the DC level at the output, in volts?

Determine the current through the 300-Ohm resistor. Express your answer in milliamps (mA).   

A transformer must always bring down the voltage of the mains supply (wall power).

If Vin1 = 6V and Vin2 = 4V, how will the LED behave?

Which parameters can be set independently in a 2nd order low-pass filter?

7. Which type of cell attacks a variety of unwanted cells and causes those cells to undergo apoptosis?