In this Zener diode regulator, the source voltage varies from 6 V to 11 V. Assume that the load current  varies between 1 mA and 38 mA, and that the diode is an ideal 4 V Zener diode. What is the largest allowable resistance  that will ensure the load voltage  remains constant with variations in load current and source voltage? Please enter your answer to 3 significant figures.

Electric Motor Control
10th Edition
ISBN:9781133702818
Author:Herman
Publisher:Herman
Chapter59: Motor Startup And Troubleshooting Basics
Section: Chapter Questions
Problem 12SQ: How is a solid-state diode tested? Explain.
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In this Zener diode regulator, the source voltage varies from 6 V to 11 V. Assume that the load current  varies between 1 mA and 38 mA, and that the diode is an ideal 4 V Zener diode. What is the largest allowable resistance  that will ensure the load voltage  remains constant with variations in load current and source voltage? Please enter your answer to 3 significant figures. 

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