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Worksheetssemiconductor diode
Total questions: 50
Worksheet time: 50mins
Materials which can conduct electricity better than insulator,but not as well as conductors. This is the definition of
diode
semiconductor
conductor
insulator
superconductor
Which is not one of the properties of semiconductor?
4 electrons in outermost orbit, in covalent bonding.
atoms vibrate causes electron to break free from the bonds.
Electron free leaves hole.
Semiconductor has 2 types of charge carriers.
all of the above are the properties of it
Doping of Semiconductors
materials which can conduct electricity better than insulator, but not as well as conductors.
The process of adding of a certain amount of specific impurities atoms in the pure semiconductor.
when 4 electrons in outermost orbit.
These are the characteristics of pentavalent impurities except
•5 valence electron.
•contributing extra free electrons.
•produce n-type semiconductors.
•produce p-type semiconductors.
These are the characteristics of Trivalent impurities except
•3 valence electrons
•produce p-type semiconductors
•producing a "hole".
Boron, aluminium and gallium are the examples.
Antimony, arsenic, and phosphorus are the examples
which statement is correct? (the dark circles represent the electrons)
p-type of the diode is connected to the negative terminal.
Electron moves across the p-n junction, makes the diode forward biased
current will not flow in the circuit
reverse biased circuit
what is the meaning of rectification?
a process of smoothing using a capacitor
a process of adding impurities to pure materials
a process of converting an alternating current into a direct current by using a diode.
The diagram is a process
of doping
of adding impurities
of half-wave rectification
of full-wave rectification
This is a graph that is seen on CRO. How is it change after full wave rectification process?
Choose the diagrams that show smoothing process has occured
Diagram hows four diodes which are connected to form a rectifier.
Which wave pattern is produced on the C.R.O. screen on the diagram?
Diagram shows a n-type semiconductor.
The process of adding phosphorus atoms into crystal lattice of pure semiconductor is known as
doping
smoothen
rectification
amplification
Which of the following circuits will produce a full wave rectification?
Which statement is correct about p type semiconductor?
Doped with pentavalent atom
More free electrons than holes
Holes are minority charge carriers
Doped with trivalent atom
Diagram shows an electronic symbol representing an electronic component.
What is the electronic component?
Diode
Capacitor
Resistor
Transistor
Diagram shows a circuit with a bulb that does not light up. Which of the following actions will make the bulb light up?
Connecting a fuse to the circuit
Reversing the battery connection
Changing the power supply to a 3V battery
Reversing the bulb connection
Which of the following circuits will light up the bulb?
A
B
C
D
Diagram shows five identical bulbs P, Q, R, S and T in a circuit. Which bulbs light up continuously when the switch is on?
P, Q and T
Q and S
R and S
P and R
Which of the following circuits shows the forward-biased arrangement of a diode?
A
B
C
D
What is the function of a diode?
Acts as a current amplifier
Acts as an automatic switch
Stores electric charge
Allows the current to pass in one direction only
Diagram shows a circuit connected to the cathode ray oscilloscope (CRO).
Which of the following traces displayed on the CRO is correct when diode P is reversed?
Diagram shows four diodes connected to a direct current power supply, d.c
Which diodes are connected in forward bias?
W and Y
W and Z
X and Y
X and Z
Diagram shows four diodes connected to a direct current power supply, d.c
Which diodes are connected in forward bias?
W and Y
W and Z
X and Y
X and Z
Doping of Semiconductors
materials which can conduct electricity better than insulator, but not as well as conductors.
The process of adding of a certain amount of specific impurities atoms in the pure semiconductor.
when 4 electrons in outermost orbit.
What is the name of this Diode?
PN junction
LED
silicon
PNP
Anode is _________ Polarity in diodes
Negative
Positive
Ground
Hot Side
The characteristics of p-type semiconductors is includes
Majority carriers are holes
Has tendency to gain electron
Has tendency to donor electron
Easy to conduct electricity
The minority carriers in P-type silicon are called _________________
Neutron
Proton
Electron
Hole
How is conduction increased in an p-type semiconductor?
by increased applied electrical field
by decreased applied electrical field
by the availability of extra holes
by the availability of donor electrons
Which of the following graph shows a half-wave rectification with smoothing?
Which of the following rectifier circuit shows full-wave rectification with smoothing?
Which of the following is not correct about capacitor?
Connected in parallel to the load resistor
Produce a smoother and steadier d.c. voltage
Discharged when there is no current flow in the circuit
Lower capacitance will produce smoother d.c. voltage
Conductivity of semiconductor __________________ with increase in temperature.
increases
decreases
remains unchanged
Who contribute to the current in a semiconductor
electrons only
holes only
negative ions
both electrons and holes
Identify the n-doped crystal lattice.
Holes in n-type materials are called
majority carrier
minority carrier
diffusion current
hole current
In the forward bias arrangement of a p-n junction diode,
the n-end is connected to the positive terminal of the battery
the p-end is connected to the positive terminal of the battery
the direction of current is from n-end to p-end in the diode
the p-end is connected to the negative terminal of the battery
During formation of p-n junction
an electron diffuses from n to p side
a hole diffuses from p to n side
a hole diffuses from n to p side
an electron diffuses from p to n side
What is the most common semiconductor material used for producing integrated circuits
Quartz
Silicon
Diamond
Tantalum
LED is
Light Enhancing Diode
Light Emitting Diode
Light Emitting Detector
Light Enhancing Detector
Component that Convert AC to DC and allow current to flow in one Direction
Capacitor
Diode
Inverter
Resistor
Types of diodes used in lighting system and display
LED
zener diodes
rectifier diodes
schottky
What type of diode is this?
silicon
LED
Zener
Mylar
Diode has polarity
anode and cathode
on and off
output and input
none of the above
Device used for filter circuit is
Diode
Capacitor
Transistor
Amplifier
