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JEE Main201910 Apr 2019Evening ShiftPhysicsSemiconductorsActual

The figure represents a voltage regulator circuit using a Zener diode. The breakdown voltage of the Zener diode is 6 V and the load resistance is, R L = 4 k Ω . The series resistance of the circuit is R i = 1 k Ω . If the battery voltage V B varies from 8 V to 16 V , what are the minimum and maximum values of the current through Zener diode?

Options

  1. A0.5 m A ; 6 m A
  2. B1 m A ; 8.5 m A
  3. C0.5 m A ; 8.5 m A
  4. D1.5 m A ; 8.5 m A

Correct answer

C. 0.5 m A ; 8.5 m A

Step-by-step solution

For V 0 = 8 V 8   V - 1000   i 0 = 6   V i 0 = 2   m A i 0 - i 1 = 6 4000 = 1.5   m A i 1 = 0.5   m A For V 0 = 16   V 16   V - 1000   i 0 = 6   V i 0 = 10   m A i 0 - i 2 = 6 4000 = 1.5   m A i 2 = 8.5   m A

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