33 IN ANSWERING QUESTIONS 4-43 THROUGH 4-45, REFER TO THE FOLLOWING FORMULA:   4-43.   If a power supply produces 30 volts with no load and 25 volts under full load, what is the percent of regulation?   1.      5   2.    10   3.    20   4. 30 4-44.   If a power supply produces 10 volts with no load and 9 volts under full load, what is the percent of regulation?   1.      8   2.      9   3.    10   4. 11 4-45.   If a power supply produces 20 volts with no load and 20 volts under full load, what is the percent of regulation?   1.    1   2.    2   3.    3   4. 0 4-46.   Basic voltage regulators are classified as either series or shunt. Their classification is determined by which of the following factors?   1.    The type of regulating device used   2.    The type of regulation required   3.    The amount of regulation required   4.    The position of the regulating device in relation to the load (R_L) 4-47.   The simple series voltage regulator was designed to function as what type of resistance?   1.    Fixed resistance in series with the load   2.    Fixed resistance in parallel with the load   3.    Variable resistance in series with the load   4.    Variable resistance in parallel with the load 4-48.   A series voltage regulator is designed so that what total percentage of current flows through the regulating device?   1.      25   2.      50   3.      75   4. 100 4-49.   When a series voltage regulator is used to control output voltages, any increase in input voltage results in a/an   1.    decrease in the voltage drop across the load resistance   2.    increase in the voltage drop across the Zener diode   3.    decrease in the resistance of the regulating device   4.    increase in the resistance of the regulating device THIS SPACE LEFT BLANK INTENTIONALLY.