What happens during the regulation action of a Zener diode?
| a. | the current and voltage across the Zener remain fixed. |
| b. | the current through the series Resistance \((R_s)\) changes. |
| c. | the Zener resistance is constant. |
| d. | the resistance offered by the Zener changes. |
Choose the correct option:
| 1. | (a, b) | 2. | (b, d) |
| 3. | (b, c) | 4. | (c, d) |
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