The figure shows a DC voltage regulator circuit, with a Zener diode of breakdown voltage=6V. If the unregulated input voltage varies between 10 V to 16 V, then what is the maximum Zener current?

 

  • Option 1)

    2.5 mA

  • Option 2)

    1.5 mA

  • Option 3)

    7.5 mA

  • Option 4)

    3.5 mA

 

Answers (1)

 

Zener diode -

It can operate continuously without being damaged in the region of reverse  biased

- wherein

1) It acts as voltage regulator

2) In forward biasing it act as ordinary diode .

 

 

i_{1}=\frac{6}{4}=1.5 mA

When the battery voltage is 16 V, the maximum current will be obtained

i=\frac{16-6}{2}=5mA

i_{max}=5-1.5=3.5mA


Option 1)

2.5 mA

Option 2)

1.5 mA

Option 3)

7.5 mA

Option 4)

3.5 mA

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