Elektrotehniško-računalniška strokovna šola in gimnazija Ljubljana ...

amountdollElectronics - Devices

Nov 2, 2013 (4 years and 12 days ago)

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Elektrotehniško
-
računalniška strokovna šola in gimnazija Ljubljana


UČNA PRIPRAVA ZA TIMSKO POUČEVANJE

Team Teaching Preparation


Predmet
/
-
a/
-
i
Subject
(
s
)

ELK3P / English

Učitelja/
J
i

Teachers

Igor Petrovčič / Amresh Prakash Torul

Letnik, r
azred

Class


G3
.
A / G3
.
B

Učni sklop,

tema

Topic


The Transistor

Datum,

zaporedna št. ure

Date
, No of lessons


11
th

March (G3B)


Block of 2 hours

18
th

March (G3A)


Block of 2 hours

[repeated]

Učilnica

Classroom


K5


Žarišče ure oz. sklopa
(npr. razvijanje kritičneg
a mišljenja)
:

Lesson focus:

English for Specific Purpose
, Content
-
based foreign language learning



Vrsta timskega poučevanja

Team teaching type



Alternative, Parallel

Učna oblika

Teaching design


Frontal, Working in pairs

Učna metoda

Teaching method


Explanation/Conversation

Učna sredstva in pripomočki

-

za učitelja:

-

za dijake



-

internet, handout

-

internet, handout, Moodle


Teaching aids
, devices

-

teacher

-

student


Potrebno predznanje dijakov:

Prior required knowledge

Students should have learnt a
bout transistors in the Electronics class.


CILJI 1. PREDMETA

Learning

objectives (
ELK3P
):

Students

consolidate what they have learnt about transistors in the Electronics
class.


CILJI 2. PREDMETA

Learning

objectives (
ENG
):

-

Students
learn the technical

English vocabulary connected to transistors.

-

Students are able to explain the
basic
theory of transistors in English
.



SKUPNI CILJ

Common aim

Students are able to explain the
basic
theory of transistors in Slovene and
English.


N
ačrtovanje
dela (skupni dogovori) učiteljev pred izvedbo učne ure

Teachers’

planning

Both teachers had meetings with the project leaders
Ms Mojca Fink and Ms Vida Vidmar,
to
agree on the approach to adopt for the ESP lessons.


To prepare for this block of

2
hours
, the Electronics teacher gave the Foreign Teacher a
general idea about what the students have been learning about transistors.


The Electronics teacher then selected a few technical texts about trans
istors and verified the
content

to make sure tha
t it is in line with what the students already learned about transistors.
The Foreign Teacher used the content of these texts to compile a comprehension text about
transistors. Much of the material had to be adapted for the students.


Once both teachers
agreed on the text, the Foreign Teacher developed the exercises to be
included in the handout.

Th e p r o j e c t l e a d e r s ( Ms F i n k a n d Ms Vi d ma r ) c h e c k e d a n d
a p p r o v e d t h e h a n d o u t.


Th e
F o r e i g n Te a c h e r a n d t h e t e a c h e r o f El e c t r o n i c s

me t r e g u l a r l y a t s c h o o l a n d f r
o m

h o me
( u s i n g S k y p e ) t o d i s c u s s t h e l e s s o n s.


POTEK UČNE URE

Teachers' and students' activities

Čas

/
Time


English teacher


Teacher of
electronics

Dijaki

Students

15 min

Warm
-
up
Discussion

about
transistors
























10

min

Comprehension

Text



individual
reading

















Open the discussion in
English
/Slovene

about
Transistors.
Encourage students to
participate and not to
worry about mis
takes
at this stage. This is
just a warm
-
up
activity.


Questions asked to
students:


1.

What
have you
learned about
transistor
s
?


2.

Describe the
experiments that
you have carried
out with
transistors.






Ask students to
underline keywords
and other difficult

words from the text

while they read
.


Ask them to check the
words in the Moodle
glossary that they have
compiled.

Introduce the topic of
the lesson and briefly
explain what will be
done during the 2
lessons.


Facilitate the
discussion by helping
the students w
hen
they have difficulty.


Make sure that every
student participates in
the discussion.















Give students
instructions to read
the text on their own
for 10 minutes.












Listen to the teacher
while he introduces the
top
ic.




Participate in the
discussion by
answering the questions
and asking any further
questions to the
teachers.

















Read the text alone.





Underline keywords
and other difficult
words.




Check the definitions of
the words in the
Moodle glo
ssary.



20

min

Comp
rehension

Text



class
reading










----
2
nd

lesson
----


15

min

Exercises














15

min

Exercises

Check




15

min

Review








Correct students’
pronunciation mistakes
while they read.
Remind them of
important keywords
for each paragraph.





Give students
inst
ruction to do the
exercises that follow
the comprehension

text
.






Walk around to help
students

with English
language problems.



Start checking the
answers with students.
Explain any difficult
words from the
exercises.


Lead a similar
discussion as the

one
done at the start of the
block. Use the
discussion to review
the vocabulary
covered during the
lessons.


Give students
instructions to read
aloud. (each student
reads one par
agraph)
.


After each paragraph,
explain the content
briefly in Slovene,
and review the
Electronics concepts
if students have
forgotten them.









Ask students to do the
exercises alone and
then check their
answers in pairs


Walk around to help
students
with the
Electronics part.



Supplement
explanations using
appropriate
Electronics theories.



Help students with
Slovene translations
and explanations of
English keywords to
make sure they
understand them.


Read paragraph from
the text (one at a time).




Take notes from
teachers’ explanations
and comments.








Do the exercises and
ask for help whenever
needed.


Check answers in pairs.




















Ugotavljanje učnih dosežkov (preverjanje, ocenjevanje)

Assessment of learning outcomes


The use of two discussions (one at the start and the other at the end) will give a

general
idea of how much the students have learnt about the vocabulary for
transistor
s.


Student
s’ handouts will be collected and checked by the teachers.


Students will also be tested about transistors vocabulary in an English test.


Evalvacija/refleksija učiteljev /
Evaluation of the lesson

This block of 2 hours was a good experience f
or everyone (teachers and
students). Before we started, the students were confident of their knowledge of
transistors and most of them thought that they could easily express this
knowledge in the English language. However, once we started and had the fir
st
discussion, they realised that it was not as easy as they had thought.


As teachers, we also noticed that the level of understanding of technical text
varied from student to student. The Electronics teacher had to take the time to
explain the text usin
g Slovene language in order to get some students to
understand.


After the explanation of the text, students felt more comfortable with the
content and wer
e willing to do the exercises. The second discussion showed
that most students were able to explain
how transistors work in English.
However,
most of them made grammatical mistakes while explaining, which
suggested that more work has to be done with grammar in the English class.




Viri in literatura

/
Sources

http://knol.google.com/k/electronic
-
circuits
-
design
-
for
-
beginners
-
chapter
-
8#

http://en.wikipedia.org/wiki/Transistor#Bipo
lar_junction_transistor

http://www.kpsec.freeuk.com/trancirc.htm

http://www.allaboutcircuits.com/vol_3/chpt_4/1.html


Priloge

/
A
ppendices

1.

Handout (The Transistor)

2.

Handout (The Transistor) with Answers


The Transistor


Read the text and answer the questions that follow.


A
transistor

is made of a solid piece of
semiconductor

material, with
at least three terminals for connectio
n to an external
circuit
.

Silicon

is
the main material from which semiconductors are made
.
Pure
silicon

is
not
conductive
. However, it can be made conductive by adding other
elements to its crystalline structure, which then become known as "n
-
type" or "p
-
type" silicon.


N
-
type silicon

is silicon that has been
chemically combined (
doped
) with
phosphorus gas to make it conductive. A
silicon
atom

has four
electrons

in its
outer
shell

and bonds tightly with four surrounding
silicon atoms creating a
crystal ma
trix

with
eight electrons in the outer shells

(first
diagram)
. However, phosphorus has five
electrons, and when combined

with silicon
atoms
, the fifth
phosphorus
electron becomes
a
free

electron

that moves easily within the
crystal when a voltage is applie
d. Because
the
charge carriers

are electrons, n
-
type
refers to a negative charge.


In contrast,
p
-
type silicon

is silicon doped
with boron gas
which

turns it into a conductive
material that readily accepts electrons when
voltage is applied. Boron has onl
y three
electrons in its outer shell and can bond with
only three of the four surrounding silicon
atoms. This leaves one silicon atom with a
vacant location in its outer shell, called a
hole
,
which readily accepts an electron.
Because the charge carriers a
re holes, p
-
type
silicon is said to have a positive charge.


A
bipolar transistor

is like
a sandwich made
of a combination of N and P type silicon. The filling of the sandwich
is a very thin region called "
base

(B)
", and the two slices of bread
are called

"
collector

(C)
" and "
emitter

(E)
". Depending on the
position

of materials N and P, transistors are called "
NPN
" or "
PNP
".


The essential usefulness of a transistor comes from its ability to use
a small signal to control a much larger signal. This property

is called
gain
. A transistor can control its output in

proportion to the input
signal,

that is, it can act as an
amplifier
. Alternatively, the
transistor can be used to turn current on or off in a circuit as
an electrically controlled
switch
, where the am
ount of current
is determined by other circuit elements.


1.

Indicate whether the following statements are true (T) or false (F).


a)

All transistors

use silicon as semiconductor material. _____


b)

Silicon can be made conductive through the process of doping. _
____


c)

N
-
type silicon is silicon which has been chemically combined with boron gas. _____


d)

In n
-
type silicon, the charge carriers are electrons. _____


e)

N
-
type silicon has a positive charge. _____


f)

Boron has only 3 electrons in its outer shell. _____


g)

Th
e charge carriers of p
-
type silicon are holes. _____


h)

The emitter of a transistor is the thin region between its collector and base. _____


i)

The
ability to use a small signal
to control a much larger signal is called gain. _____


j)

Because of the property
called gain, transistors are used as amplifiers
. _____



2.

Match the terms (on the left) to their definitions/description
s

(on the right).


1

semiconductor

A

it contains the valence electrons of an atom

2

doping

B

a free
particle carrying an electric charg
e

3

atom

C

an electrical component that
can break an electrical
circuit and interrupt

the current

4

outer shell

D

physically separates the emitter and collector regions

5

free electron

E

the process of intentionally introducing impurities into an
extrem
ely pure semiconductor to change its electrical
properties

6

charge carrier

F

i
f enou
gh energy is applied
,
it
will leave the atom

7

hole

G

the smallest component of an element having the
chemical properties of the element

8

base

H

an
electronic equipmen
t that increases
the
strength of
signals passing through it

9

amplifier

I

a

substance with electrical properties intermediate
between a good conductor and a good insulator

10

switch

J

the absence of an electron from an otherwise full electron
shell



1

2

3

4

5

6

7

8

9

10











3.

Answer the following questions.


a)

How can silicon be made conductive?










b)

What is the difference between n
-
type and p
-
type silicon?










c)

What are the three regions of a bipolar transistor?










d)

Explain the term
g
ain
.










e)

How can transistors be used?









Adapted from:

http://knol.google.com/k/electronic
-
circuits
-
design
-
for
-
beginners
-
chapter
-
8#

http://en.wikipedia.org/wiki/Transistor#Bipolar_junction_transistor

http://www.kpsec.freeuk.com/trancirc.htm

http://www.allaboutcircuits.com/vol_3/chpt_4/1.html

The Transistor
-

Answers:


1.

Indicate whether the following statements are true (T) or false (F).


a)

All transistors

use silicon as semiconductor material. __F__


b)

Sil
icon can be made conductive through the process of doping. __T__


c)

N
-
type silicon is silicon which has been chemically combined with boron gas. __F__


d)

In n
-
type silicon, the charge carriers are electrons. __T__


e)

N
-
type silicon has a positive charge. __F
__


f)

Boron has only 3 electrons in its outer shell. __T__


g)

The charge carriers of p
-
type silicon are holes. __T__


h)

The emitter of a transistor is the thin region between its collector and base. __F__


i)

The
ability to use a small signal
to control a much l
arger signal is called gain. __T__


j)

Because of the property called gain, transistors are used as amplifiers
. __
T
__



2.

Match the terms (on the left) to their definitions/description
s

(on the right).


1

semiconductor

A

it contains the valence electrons of a
n atom

2

doping

B

a free
particle carrying an electric charge

3

atom

C

an electrical component that
can break an electrical
circuit and interrupt

the current

4

outer shell

D

physically separates the emitter and collector regions

5

free electron

E

the process of intentionally introducing impurities into an
extremely pure semiconductor to change its electrical
properties

6

charge carrier

F

i
f enou
gh energy is applied
,
it
will leave the atom

7

hole

G

the smallest component of an element having the
c
hemical properties of the element

8

base

H

an
electronic equipment that increases
the
strength of
signals passing through it

9

amplifier

I

a

substance with electrical properties intermediate
between a good conductor and a good insulator

10

switch

J

the
absence of an electron from an otherwise full electron
shell



1

2

3

4

5

6

7

8

9

10

I

E

G

A

F

B

J

D

H

C

3.

Answer the following questions.


a)

How can silicon be made conductive?


B
y adding other elements to its crystalline structure
.


E.g. Phosphorous gas c
an be used to produce N
-
type silicon and Boron gas can be used
to produce P
-
type silicon.




b)

What is the difference between n
-
type and p
-
type silicon?


N
-
type silicon is silicon which has been doped with phosphorous gas whereas P
-
type
silicon is silicon wh
ich has been doped with boron gas.


N
-
type silicon has a negative charge whereas P
-
type silicon has a positive charge.


In N
-
type silicon, the charge carriers are electrons. In P
-
type silicon, the charge carriers
are holes.




c)

What are the three regions o
f a bipolar transistor?


The three regions of a bipolar transistor are its Collector, Base and Emitter.




d)

Explain the term
gain
.


Gain is the
ability
of an electronic element
to use a small signal to control a much larger
signal
. E.g. Amplifier




e)

How ca
n transistors be used?


Transistors can be used as amplifiers because they have the property called gain.


They can also be used as electronically
-
controlled switches, t
o turn current on or off in a
circuit








Adapted from:

http://knol.google.com/k/electronic
-
circuits
-
design
-
for
-
beginners
-
chapter
-
8#

http://en.wikipedia.org/wiki/Tr
ansistor#Bipolar_junction_transistor

http://www.kpsec.freeuk.com/trancirc.htm

http://www.allaboutcircuits.com/vol_3/chpt_4/1.html