diodes

Question 1

a semiconductor device with two terminals, typically referred to as
the anode and the cathode. It primarily functions as an electrical one-way valve,
allowing the flow of current in one direction while blocking it in the opposite
direction.

Answer 1

diode

Question 2

the process of adding impurity to
the semiconductor to increase its conductance.

Answer 2

doping process

Question 3

The P type material has more
positive carriers called _________while the N type material has more negative carriers
called ______

Answer 3

holes ,electrons.

Question 4

pentavalent impurites
(added to semi con to form N type)

Answer 4

Phosphorus
arsenic
antimony
bistmuth

Question 5

trivalent impurites
(added to semi con to form P type)

Answer 5

aluminum
gallium
boron
indium

Question 6

When the anode of the diode is connected to the positive terminal of the
supply voltage and the cathode is connected to the negative terminal of the
supply voltage, there is an appreciable amount of current because the diode has
low resistance in this bias.

Answer 6

forward bias

Question 7

This bias uses the reverse connection of forward bias. The anode of the
diode is attached to the negative terminal while the cathode is at the positive
terminal of the supply voltage. In this bias, the resistance of the diode increases
because the depletion region widens. There is negligible current, and the diode
is considered off or not conducting.

Answer 7

reverse bias

Question 8

they are
used to convert alternating current (AC) into direct current (DC). This is achieved
by using diodes to allow the flow of current only during one half cycle of the AC
waveform, effectively “clipping” the negative half, resulting in a unidirectional flow
of current.

Answer 8

rectification

Question 9

a special type of diode designed to operate in the
reverse-biased breakdown region. They are used as regulator that provides
stable output voltage.

Answer 9

zener dioede

Question 10

a type of diode that emits light when
current flows through them and is commonly used as indicator and in displays.

Answer 10

LED

Question 11

can be used as switches in digital logic circuits and signal
conditioning circuits. They allow or block the flow of current depending on the
biasing conditions, which is essential for signal processing and switching
applications.

Answer 11

switching diode

Question 12

exploit quantum tunneling effects are used in high
frequency oscillators.

Answer 12

tunnel diode

Question 13

variable capacitance diodes used in tuning and
frequency modulation applications.

Answer 13

varactor diodes

Question 14

detect light and convert it into an electrical current,
commonly used in optical sensors and detectors.

Answer 14

photodiodes