Explanation: Input is positive, hence it is amplified by the operational amplifier which switches the diode on. Current flows through the load & because of the feedback, the output voltage is equal to the input voltage. 10. Zener diodes allow a current to flow in the reverse direction, when the
A. voltage reaches above a certain value
B. temperature reaches above a certain value
C. current always flows in the reverse direction only
D. current cannot flow in the reverse direction
Answer:A
Explanation: Input is positive, hence it is amplified by the operational amplifier which switches the diode on. Current flows through the load & because of the feedback, the output voltage is equal to the input voltage. 10. Zener diodes allow a current to flow in the reverse direction, when the
A. voltage reaches above a certain value B. temperature reaches above a certain value C. current always flows in the reverse direction only D. current cannot flow in the reverse direction
Explanation: Zener diode has voltage regulating property. When voltage reaches above a certain value (Zener voltage), current starts to flow in the reverse direction. Sanfoundry Global Education & Learning Series – Power Electronics.