Podcast
Questions and Answers
What happens to the reverse current as the reverse voltage is increased in a zener diode?
What happens to the reverse current as the reverse voltage is increased in a zener diode?
- It becomes constant
- It fluctuates
- It remains extremely small (correct)
- It increases rapidly
What is the main purpose of a zener diode?
What is the main purpose of a zener diode?
- To operate as an amplifier
- To operate as a switch
- To operate in the forward-bias region
- To operate in the breakdown region (correct)
What effect does the increase in reverse current have on the zener impedance (ZZ) in a zener diode?
What effect does the increase in reverse current have on the zener impedance (ZZ) in a zener diode?
- It increases rapidly
- It remains constant
- It fluctuates
- It decreases rapidly (correct)
Which part of a zener diode's characteristic curve marks the beginning of the breakdown effect?
Which part of a zener diode's characteristic curve marks the beginning of the breakdown effect?
What happens to the zener breakdown voltage (VZ) as the zener current (IZ) increases?
What happens to the zener breakdown voltage (VZ) as the zener current (IZ) increases?
What does an actual voltage curve in a zener diode indicate when a change in zener current occurs?
What does an actual voltage curve in a zener diode indicate when a change in zener current occurs?
What is the ratio of voltage to current in an LED?
What is the ratio of voltage to current in an LED?
How is the light output of an LED affected by temperature?
How is the light output of an LED affected by temperature?
What type of material was used in early LEDs that emitted invisible IR radiation?
What type of material was used in early LEDs that emitted invisible IR radiation?
What is the zener impedance?
What is the zener impedance?
What happens when an LED is forward-biased?
What happens when an LED is forward-biased?
What was used to produce the first visible red LEDs?
What was used to produce the first visible red LEDs?
What does Ohm’s law indicate about impedance?
What does Ohm’s law indicate about impedance?
What characteristic curve does a zener diode exhibit a certain change in VZ for a certain change in IZ?
What characteristic curve does a zener diode exhibit a certain change in VZ for a certain change in IZ?
What was the semiconductor material used in early LEDs that emitted IR radiation?
What was the semiconductor material used in early LEDs that emitted IR radiation?
According to Ohm's law, what does I/Z represent for LEDs?
According to Ohm's law, what does I/Z represent for LEDs?
What is the effect of temperature on the light intensity of an LED?
What is the effect of temperature on the light intensity of an LED?
