Figure shows a DC voltage regulator circuit, with a Zener diode of...

Figure shows a

DC

voltage regulator circuit, with a Zener diode of breakdown voltage

= 6V

. If the unregulated input voltage varies between

10V

16V,

then what is the maximum Zener current?
Figure shows a DC voltage regulator circuit, with a Zener diode of breakdown voltage = 6V . If the unregulated input

Figure shows a DC voltage regulator circuit, with a Zener diode of breakdown voltage = 6V . If the unregulated input

Options

A $1.5mA$
B $3.5\text{mA}$
C $7.5mA$
D $2.5mA$

Correct answer

B. $3.5\text{mA}$

Step-by-step solution

Figure shows a DC voltage regulator circuit, with a Zener diode of breakdown voltage = 6V . If the unregulated input
Current through $2KΩ$ is
$i = \dfrac{10}{2000} = 5mA$
Current through 4 $KΩ$
${i}_{L} = i - {i}_{z} = \dfrac{6}{4000} = 1.5mA$
$⇒ {i}_{z} = i - 1.5$

$∴ {i}_{z} = 5 - 1 .5 = 3 .5 mA$

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