L2

Question 1

Diodes that use to prevent connection wrongly is called blocking diode

Answer 1

False. (Protection)

Question 2

Diodes that prevent high induced voltage by a coil to damage a
the battery is called a protection diode

Answer 2

False. (Blocking )

Question 3

Diodes that change dc to ac is called a rectifier

Answer 3

False. ( AC to DC not DC to AC)

Question 4

SBD are fast diodes

Answer 4

True. SBD and FRD are fast diodes

Question 5

FRD are fast diodes

Answer 5

True. SBD and FRD are fast diodes

Question 6

SBD is faster than FRD but the breakdown voltage is not so good

Answer 6

True. FRD 10-100ns, SBD 1ns in terms of Trr. SBD (high leakage current )

Question 7

SBD has a low forward voltage

Answer 7

True. SBD forward voltage between 0.15V to 0.4V whereas FBD 1.3 v to 3.6V

Question 8

Reverse recovery means recovery in reverse

Answer 8

False .
If the opposite voltage is suddenly applied to a
forward biased diode, current will continue to flow in
the forward direction for a brief moment
This
time until the current stops flowing is called the
Reverse Recovery Time

Question 9

Varactors are variable inductance

Answer 9

True .
Varactors
are special diodes that operate in reverse biased
and act as a variable capacitor.

Question 10

The higher the reverse voltage, the higher varactor

capacitance

Answer 10

False. reverse voltage is inversely proportional to capacitance.

Question 11

The higher the forward voltage, the higher the varactor

capacitance

Answer 11

Falze .reverse voltage is inversely proportional to the capacitance. Also look at the question it say forward but it supposed to be reverse biased.

Question 12

Zener diodes are protection diodes

Answer 12

False. It is for voltage regulation

Question 13

Zener diodes are voltage regulator

Answer 13

True. It is for voltage regulation

Question 14

Zener diodes operate in forwarding bias

Answer 14

False, It operated in reversed biased

Question 15

The Colour of LED depends on the colour of the LED casing

Answer 15

False.

Question 16

The Colour of LED depends on the amount of doping

Answer 16

False

Question 17

LED will light up when a reverse bias

Answer 17

False

Question 18

The photodiode is reversed bias

Answer 18

True

Question 19

When the light fell on the photodiode, the photodiode

resistance drop

Answer 19

True