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BEEE 23-24

Total questions: 35

Worksheet time: 18mins

Name
Class
Date
1.
What does this picture show?
a)
A multimeter
b)
A breadboard
c)
A circuit board
d)
A resistor
2.
Which color wire is used for ground?
a)
red
b)
black
c)
green 
d)
yellow
3.

Ohm's Law is

a)

IR=V

b)

I=VR

c)

V=I/R

d)

VI=R

4.

Rahul wants to buy a semiconductor material for his project. But he does not know about the material property. If you are a friend of Rahul, what would you suggest him to buy

a)

Gold

b)

Copper

c)

Germanium

d)

Silver

5.

LED is

a)

Light Enhancing Diode

b)

Light Emitting Diode

c)

Light Emitting Detector

d)

Light Enhancing Detector

6.

Which one is a 3 terminal device?

a)

Varactor diode

b)

LASER diode

c)

Transistor

d)

LED

7.

BJT is

a)

Bidirectional Junction Transistor

b)

Bipolar Junction Transistor

c)

Bidirectional Junction Transmitter

d)

Bipolar Junction Transmitter

8.

Materials which can conduct electricity better than insulator,but not as well as conductors. This is the definition of

a)

diode

b)

semiconductor

c)

conductor

d)

insulator

e)

superconductor

9.

Which is not one of the properties of semiconductor?

a)

4 electrons in outermost orbit, in covalent bonding.

b)

atoms vibrate causes electron to break free from the bonds.

c)

Electron free leaves hole.

d)

Semiconductor has 2 types of charge carriers.

e)

all of the above are the properties of it

10.

These are the characteristics of Trivalent impurities except

a)

•3 valence electrons

b)

•produce p-type semiconductors

c)

•producing a "hole".

d)

Antimony, arsenic, and phosphorus are the examples

11.

What is the most common semiconductor material used for producing integrated circuits

a)

Quartz

b)

Silicon

c)

Diamond

d)

Tantalum

12.

How is conduction increased in an p-type semiconductor?

a)

by increased applied electrical field

b)

by decreased applied electrical field

c)

by the availability of extra holes

d)

by the availability of donor electrons

13.

These are materials that have excellent current carrying capacity.

a)

Semiconductor

b)

Conductors

c)

Insulators

d)

Diodes

14.

These are materials that have no current carrying capacity.

a)

Semiconductor

b)

Conductors

c)

Insulators

d)

Diodes

15.

These are materials that have a conductivity between a good conductor and an insulator.

a)

Semiconductor

b)

Conductors

c)

Insulators

d)

Diodes

16.

These are semiconductors in which intentionally impurities are added to make the element conductive.

a)

Intrinsic Semiconductor

b)

Extrinsic Semiconductor

c)

P-type Semiconductor

d)

N-type Semiconductor

17.

A semiconductor doped with a pentavalent impurity element which has five electrons in its valence shell.

a)

Intrinsic Semiconductor

b)

Extrinsic Semiconductor

c)

P-type Semiconductor

d)

N-type Semiconductor

18.

Majority Carrier in a P-type Semiconductor.

a)

Acceptor Ion

b)

Donor Ion

c)

Positive Charge

d)

Negative Charge

19.

Addition of pentavalent impurity to a semiconductor creates _____.

a)

Free Electrons

b)

Holes

c)

Valence Electrons

d)

Valence Ion

20.

The unit of charge is _________

a)

Voltage

b)

Ampere

c)

Coulombs

21.

___________is the central part of an atom.

a)

Protons

b)

Neutrons

c)

Nucleus

22.

What are the 3 legs of a transistor called?

a)

Base, Electrode, Commiter

b)

Bridge, Collector, Extruder

c)

Base, Collector, Emitter

d)

Brake, Collection, Emit

23.

What is the correct name for this component?

a)

Transistor

b)

Resistor

c)

Thyristor

d)

Thermistor

24.

The shorter leg of an LED is what?

a)

Positive

b)

Negative

25.

Unit of capacitance is___________

a)

Volts

b)

Farad

c)

Henry

d)

Newton

26.

Which of the following is the unit of inductance?

a)

Ohm

b)

Henry

c)

Ampere turns

d)

Webers/meter

27.

A semiconductor has generally ……………… valence electrons.

a)

2

b)

3

c)

6

d)

4

28.

The forbiddenn energy gap for Germanium is of the order of

a)

(a) 0.7 eV

b)

(b) 0.3 eV

c)

(c) 1.1 eV

d)

(d) 10 eV

29.

Which of the following is a pentavalent impuity added while forming an extrinsic semiconductor ?

a)

Boron

b)

Arsenic

c)

Indium

d)

Gallium

30.

Doping of Semiconductors

a)

materials which can conduct electricity better than insulator, but not as well as conductors.

b)

The process of adding of a certain amount of specific impurities atoms in the pure semiconductor.

c)

when 4 electrons in outermost orbit.

31.

The process of adding an impurity to an intrinsic semiconductor is called

a)

Doping

b)

Ionization

c)

Recombination

d)

Atomic modification

32.

The minority carriers in P-type silicon are called _________________

a)

Neutron

b)

Proton

c)

Electron

d)

Hole

33.

Electrons and holes are equal in magnitude but opposite in polarity

a)

True

b)

False

34.

An n type semiconductor is negatively charged

a)

True

b)

False

35.

Who contribute to the current in a semiconductor

a)

electrons only

b)

holes only

c)

negative ions

d)

both electrons and holes

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