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WorksheetsElectro2 MSW2
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
A semiconductor device that allows current to flow in only one direction is a:
a)
Transistor
b)
Diode
c)
Capacitor
d)
Inductor
2.
Which type of diode allows reverse current flow at a specific voltage?
a)
Schottky diode
b)
Zener diode
c)
Light Emitting Diode
d)
Rectifier diode
3.
A Schottky diode is characterized by its:
a)
High reverse breakdown voltage.
b)
High power consumption.
c)
Low forward voltage drop.
d)
Slow switching speed.
4.
What happens when current flows through a Light Emitting Diode (LED)?
a)
It generates a magnetic field.
b)
It stores electrical charge.
c)
It emits light.
d)
It significantly increases resistance.
5.
Materials that permit the easy flow of electrical current are classified as:
a)
Conductors
b)
Insulators
c)
Semiconductors
d)
Superconductors
6.
In conductors, the movement of which subatomic particles facilitates electrical current?
a)
Protons
b)
Neutrons
c)
Atoms
d)
Electrons
7.
Materials that strongly impede the flow of electric current are known as:
a)
Conductors
b)
Insulators
c)
Semiconductors
d)
Resistors
8.
The high resistivity of insulators is primarily due to their atoms having:
a)
Loosely bound electrons.
b)
A large number of free electrons.
c)
Mobile ions.
d)
Tightly bound electrons.
9.
Semiconductors are defined as materials with conductivity:
a)
Similar to conductors.
b)
Similar to insulators.
c)
Lower than insulators.
d)
Between conductors and insulators.
10.
How does the resistivity of a semiconductor typically change with increasing temperature?
a)
Resistivity increases linearly.
b)
Resistivity remains constant.
c)
Resistivity fluctuates randomly.
d)
Resistivity decreases.
11.
Pure semiconductors with an equal number of electrons and holes are called:
a)
Extrinsic semiconductors.
b)
Doped semiconductors.
c)
P-type semiconductors.
d)
Intrinsic semiconductors.
12.
What is the process of adding impurities to a semiconductor to alter its conductivity called?
a)
Insulation
b)
Conduction
c)
Doping
d)
Rectification
13.
Extrinsic semiconductors where holes are the majority charge carriers are classified as:
a)
N-type semiconductors.
b)
Intrinsic semiconductors.
c)
P-type semiconductors.
d)
Zener semiconductors.
14.
What type of impurity is added to an intrinsic semiconductor to create a P-type semiconductor?
a)
Pentavalent impurities (e.g., Arsenic).
b)
Elements with four valence electrons (e.g., Germanium).
c)
Trivalent impurities (e.g., Boron).
d)
Elements with one valence electron (e.g., Copper).
15.
Extrinsic semiconductors where extra electrons are the majority charge carriers are classified as:
a)
P-type semiconductors.
b)
Intrinsic semiconductors.
c)
Zener semiconductors.
d)
N-type semiconductors.
16.
What type of impurity is added to an intrinsic semiconductor to create an N-type semiconductor?
a)
Trivalent impurities (e.g., Boron).
b)
Elements with four valence electrons (e.g., Silicon).
c)
Elements with two valence electrons (e.g., Magnesium).
d)
Pentavalent impurities (e.g., Phosphorus).
17.
In an intrinsic semiconductor, the number of free electrons is _______ the number of holes.
a)
Greater than
b)
Less than
c)
Significantly different from
d)
Equal to
18.
The forward voltage drop across a Schottky diode is typically in the range of:
a)
0.7 - 1.1 V
b)
150 – 450 mV
c)
2 - 3 V
d)
Greater than 5 V
19.
Light emission in an LED is a direct consequence of the semiconductor's:
a)
Electrical resistance.
b)
Magnetic permeability.
c)
Band gap.
d)
Thermal conductivity.
20.
Which of the following lists materials in order of increasing resistivity at room temperature?
a)
Insulator, Semiconductor, Conductor
b)
Semiconductor, Conductor, Insulator
c)
Conductor, Semiconductor, Insulator
d)
Conductor, Insulator, Semiconductor
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