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Electronic Devices - Special-Purpose Diodes

Exercise : Special-Purpose Diodes - General Questions
11.
LEDs are made out of
silicon.
germanium.
gallium.
silicon and germanium, but not gallium.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
The normal operating region for a zener diode is the
forward-bias region.
reverse-bias region.
zero-crossing region.
reverse-breakdown region.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Refer to this figure. If VIN attempts to increase, VR will

increase.
decrease.
remain the same.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
An LED is forward-biased. The diode should be on, but no light is showing. A possible trouble might be
the diode is open.
the series resistor is too small.
none. The diode should be off if forward-biased.
the power supply voltage is too high.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
A 6.2 V zener is rated at 1 watt. The maximum safe current the zener can carry is
1.61 A.
161 mA.
16.1 mA.
1.61 mA.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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