Answer the following statement(s) true (T) or false (F)
1. The operational amplifier, or op amp, is a high-gain differential amplifier that can amplify AC or DC voltages.
2. The open-loop voltage gain does not vary significantly from op amp to op amp.
3. The voltage follower can be used only to match a high impedance input stage to a low impedance output stage.
4. The feedback resistor provides positive feedback that will reduce the gain to a manageable level.
5. Op amp differential amplifiers are not used in closed-loop systems.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. FALSE
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Answer the following statement true (T) or false (F)
Invided bidding means that only those companies on the _________ can bid on a job.
Fill in the blank(s) with the appropriate word(s).
Bathroom ventilation fans are available in sizes ranging from about ____.
A. 10 CFM to over 75 CFM B. 25 CFM to over 100 CFM C. 50 CFM to over 200 CFM D. 75 CFM to over 300 CFM
Thermistors react according to the principle of __________ temperature coefficient.
A. negative B. positive