Special-Purpose Diodes - General Questions (3)

Directions to Solve

Special-Purpose Diodes - General Questions

17.

An LED is forward-biased. The diode should be on, but no light is showing. A possible trouble might be

A.	the diode is open.
B.	the series resistor is too small.
C.	none. The diode should be off if forward-biased.
D.	the power supply voltage is too high.

Answer: Option A

Explanation:

No answer description available for this question

18.

Refer to this figure. If V_IN attempts to increase, V_R will

mcq3_1007_1 (1)

A.	increase.
B.	decrease.
C.	remain the same.

Answer: Option A

Explanation:

No answer description available for this question

19.

The normal operating region for a zener diode is the

A.	forward-bias region.
B.	reverse-bias region.
C.	zero-crossing region.
D.	reverse-breakdown region.

Answer: Option D

Explanation:

No answer description available for this question

20.

LEDs are made out of

A.	silicon.
B.	germanium.
C.	gallium.
D.	silicon and germanium, but not gallium.

Answer: Option C

Explanation:

No answer description available for this question.

21.

Refer to this figure. Identify the Schottky diode.

mcq3_1011_1 (4)

A.	a
B.	b
C.	c
D.	d
E.	e

Answer: Option E

Explanation:

No answer description available for this question

22.

Which diode employs graded doping?

A.	zener
B.	LED
C.	tunnel
D.	step-recovery

Answer: Option D

Explanation:

No answer description available for this question

23.

Refer to this figure. Which symbol is correct for a zener diode?

A.	a
B.	b
C.	c
D.	d
E.	e

Answer: Option B

Explanation:

No answer description available for this question

24.

What kind of diode is formed by joining a doped semiconductor region with a metal?

A.	laser
B.	tunnel
C.	pin
D.	Schottky

Answer: Option D

Explanation:

No answer description available for this question

Special-Purpose Diodes - General Questions (3)

Special-Purpose Diodes - General Questions

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