ECT 125 Week 8 Final exam

ECT 125 Week 8 Final exam

Author: Christine Farr


1. (TCO 5) If Va = 2V, what is Vout?
2. (TCO 3) If Vin = 2V, and Rload = 1k ohm, what is the current through Rload?
3. (TCO 4) If an audio amplifier integrated circuit uses a dual power supply of +/- 30V for the power supply, will there be a capacitor on the output of the audio amp? Why or why not?
4. (TCO 7) Positive feedback causes ______.
5. (TCO 6) The filter below left is a ________ pass filter, and it is made with one RC circuit the maximum rolloff will be ________ db/decade.
1. (TCO 2) For the circuit below, if Vcc is 50 volts and Rb is 4.3k ohms, find the base and collector voltages and currents for an input of 0V and 5V. Beta = 300, the motor resistance is 500 ohms.
2. (TCO 1) Find the following for an input of 120 VAC(RMS), 60 hertz, given a 6:1 stepdown transformer, and a full-wave bridge rectifier. Rload is 70 ohms. Round off to the nearest tenths place.
4a: Primary or input peak voltage = 
4b: Secondary peak voltage = 
4c: Peak voltage out of the rectifier =
3. (TCO 5) If the resistance of the thermistor is 900 ohms, what is Vout? Is the motor on or off?
4. (TCO 6) For the circuit below, this is a _______ pass filter. The resonant
Frequency is _________.
5. (TCO 6) For the filter below, if C = .005ufd, this is a _________ pass filter with a roll-off of ______ db/decade and a cutoff frequency of ____________.

See More
Try a College Course Free

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to over 2,000 colleges and universities.*

Begin Free Trial
No credit card required

25 Sophia partners guarantee credit transfer.

226 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 20 of Sophia’s online courses. More than 2,000 colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.