JEE MAIN - Physics (2019 - 10th April Evening Slot - No. 17)
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, RL = 4k$$\Omega $$. The series resistance of the circuit is Ri
= 1 k$$\Omega $$. If the
battery voltage VB varies from 8 V to 16 V, what are the minimum and maximum values of the current
through Zener diode?
_10th_April_Evening_Slot_en_17_1.png)
0.5 mA; 8.5 mA
1.5 mA; 8.5 mA
1 mA; 8.5 mA
0.5 mA; 6 mA
Explanation
_10th_April_Evening_Slot_en_17_2.png)
Vbreakdwon = 6V, RL = 4k$$\Omega $$, Ri = 1 k$$\Omega $$$${i_L} = {6 \over 4} \times {10^{ - 3}} = 1.5 \times {10^{ - 3}} = 1.5\,mA$$
ii = 2 × 10–3
i = i1 – iL = 0.5 mA – minimum current
ii = 10 × 10–3 = 10 mA
imax = 8.5 mA
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