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In the voltage regulator shown in the given figure, the load current can vary from 100 mAto 500 mA. Assuming that the Zener diode is ideal (i.e, the Zener knee current is negligibly small and Zener resistance is zero in the breakdown region), the value of R is    
  • a)
  • b)
    70 Ω
  • c)
  • d)
    14 Ω
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In the voltage regulator shown in the given figure, the load current c...
From the circuit given, we have


( Zener knee current is negligibly small) 
or- 14Ω < R < 70Ω
Hence, required value of R = 14Ω [closed min value]
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In the voltage regulator shown in the given figure, the load current c...
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In the voltage regulator shown in the given figure, the load current can vary from 100 mAto 500 mA. Assuming that the Zener diode is ideal (i.e, the Zener knee current is negligibly small and Zener resistance is zero in the breakdown region), the value of R is a)7Ωb)70Ωc)d)14ΩCorrect answer is option 'D'. Can you explain this answer?
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