_________ is a measure of how good a practical voltage source is in approaching an ideal voltage source
A. Internal resistance
B. Kirchhoff's current law
C. Voltage regulation
D. Parallel current source
C
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The conductors that provide electrical power to permanently installed pool lighting fixtures must be GFCI protected if the voltage is above __________ .
a. the low-voltage contact limit b. 24 volts c. 120 volts d. the high-voltage contact limit
Many national and international trade associations have trade shows primarily to:
A) Entice technicians to join their associations. B) Use them as opportunities to sell tools and service training literature to technicians. C) Provide employment for HVACR technicians. D) Display the most current innovations in equipment, tools, and service.
The zener knee current (IZK) is
A) the maximum current required to maintain current regulation B) the minimum current required to maintain voltage regulation C) the minimum current required to maintain current regulation D) the maximum current required to maintain voltage regulation
A practical op amp has
A) high input impedance B) high voltage gain C) zero output impedance D) both a and b