Element 3-18 Calculations

Question 1

What is the magnitude of the impedance of a series AC circuit having a resistance of 6 ohms, an inductive of 17 ohms, and zero captive reactance?

Answer 1

18 ohms

Question 2

a 1 watt, 10 volt Zener diode with the following characteristics, Imin=5mA; Imax=95mA; and Z=8ohms is to be used as part of a voltage regulator in a 20 V power supply. Approximately, what size current limiting resistor would be used to set its bias to the midpoint of its operating range?

Answer 2

100 Ohms

Question 3

Given a power supply with no load voltage of 12 volts and a full load voltage of 10 volts, what is the percentage of voltage regulation?

Answer 3

20%

Question 4

What ratio does a transformer need in order to match a source impedance of 500 ohms to a load of 10 ohms?

Answer 4

50 to 1

Question 5

Given a power supply with a full load voltage of 200 volts and a regulation 200 volts and a regulation of 25%, what is the no load voltage?

Answer 5

250 volts

Question 6

what is the conductance of a circuit if 6 amperes of current flows when 12 volts DC is applied?

Answer 6

50 siemens