In this Zener diode regulator, the source voltage varies from 7 V to 12 V. Assume that the load current  varies between 2 mA and 31 mA, and that the diode is an ideal 3 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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In this Zener diode regulator, the source voltage varies from 7 V to 12 V. Assume that the load current  varies between 2 mA and 31 mA, and that the diode is an ideal 3 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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