Кулон заңы 8-сынып
Кулон заңы 8-сынып

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Terminology
Coulomb’c law- Кулон заңы
To rub- үйкеу
Electric constant- электр
тұрақтысы
Repel- тебілу
Attract- тартылу
Wool- жүн
Interaction- әрекеттесу
Bakery- наубайхана
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Terminology Coulomb’c law- Кулон заңы To rub- үйкеу Electric constant- электр тұрақтысы Repel- тебілу Attract- тартылу Wool- жүн Interaction- әрекеттесу Bakery- наубайхана
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Watch the video carefully. Then
we will discuss it.
‘ Spider diagrame’ complete
the spider diagrame with given
words, then one of you will
protect it.
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Watch the video carefully. Then we will discuss it. ‘ Spider diagrame’ complete the spider diagrame with given words, then one of you will protect it.
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«Let’s work on tasks ».
Now we will play
‘Bingo’. Whoever
solves all the examples
correctly and finds
three correct answers
will win Bingo.
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«Let’s work on tasks ». Now we will play ‘Bingo’. Whoever solves all the examples correctly and finds three correct answers will win Bingo.
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№ 1. The electric force between the charges of q
1 =2.5mkC and
q
2 = 4mkC is 3.6*10 -4
N.What is the distance between them?
(1mkC=10 -6
C)
Given: For: Solution:
q
1 =2.5 mkC F=k*q
1 *q
2 /R 2
R 2
=3.6*10 -4
N/9*10 9
N*m 2
/C 2
*
q
2 = 4 mkC R 2
= F/k*q
1 *q
2 *2.5*10 -6
C*4*10 -6
C=
F=3.6*10 -4
N =0.04*10 -1
=0.004=0.063m=63mm
Find R-? Answer: R = 63 mm
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№ 1. The electric force between the charges of q 1 =2.5mkC and q 2 = 4mkC is 3.6*10 -4 N.What is the distance between them? (1mkC=10 -6 C) Given: For: Solution: q 1 =2.5 mkC F=k*q 1 *q 2 /R 2 R 2 =3.6*10 -4 N/9*10 9 N*m 2 /C 2 * q 2 = 4 mkC R 2 = F/k*q 1 *q 2 *2.5*10 -6 C*4*10 -6 C= F=3.6*10 -4 N =0.04*10 -1 =0.004=0.063m=63mm Find R-? Answer: R = 63 mm
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№ 2. Calculate the force between two charges: q
1 =4 mkC and q
2 = 6mkC. Distance between them is R=20 cm (k=9*10 9
N*m 2
/
C 2
).
Given: For: Solution:
q
1 =4 mkC F=k*q
1 *q
2 /R 2
F=9*10 9
N*m 2
/C 2
*4*10 -6
C *6*10 -6
q
2 = 6 mkC
C/(0.2m) 2
= 5400*10 -3
=5.4N
R= 20 cm
Find R-? Answer: F= 5.4 N
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№ 2. Calculate the force between two charges: q 1 =4 mkC and q 2 = 6mkC. Distance between them is R=20 cm (k=9*10 9 N*m 2 / C 2 ). Given: For: Solution: q 1 =4 mkC F=k*q 1 *q 2 /R 2 F=9*10 9 N*m 2 /C 2 *4*10 -6 C *6*10 -6 q 2 = 6 mkC C/(0.2m) 2 = 5400*10 -3 =5.4N R= 20 cm Find R-? Answer: F= 5.4 N
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№ 3 . 10nC balloon and 10nC balloon are on the distance of 10 cm
from each other. How many newtons is the electric force?
Given: For: Solution:
q
1 =10 nC F=k*q
1 *q
2 /R 2
F=9*10 9
N*m 2
/C 2
*10*10 -9
C*10*10 -9
q
2 = 10 nC
/(0.1) 2
=90 000*10 -9
=90 mcN
R= 10 cm
Find R-? Answer: F = 90 mcN
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№ 3 . 10nC balloon and 10nC balloon are on the distance of 10 cm from each other. How many newtons is the electric force? Given: For: Solution: q 1 =10 nC F=k*q 1 *q 2 /R 2 F=9*10 9 N*m 2 /C 2 *10*10 -9 C*10*10 -9 q 2 = 10 nC /(0.1) 2 =90 000*10 -9 =90 mcN R= 10 cm Find R-? Answer: F = 90 mcN
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№ 4. What is the force between two charges of +3mC and -
7mC, a distance of 2 m apart?
Given: For: Solution:
q
1 =+3 mC F=k*q
1 *q
2 /R 2
F=9*10 9
N*m 2
/C 2
*3*10 -3
C*(-7*10 -3
)
q
2 = -7 mC
/(2) 2
=47.2*10 3
N = 47.2 kN
R= 2 m Answer: F= 47.2 kN
Find R-?
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№ 4. What is the force between two charges of +3mC and - 7mC, a distance of 2 m apart? Given: For: Solution: q 1 =+3 mC F=k*q 1 *q 2 /R 2 F=9*10 9 N*m 2 /C 2 *3*10 -3 C*(-7*10 -3 ) q 2 = -7 mC /(2) 2 =47.2*10 3 N = 47.2 kN R= 2 m Answer: F= 47.2 kN Find R-?
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Conclusion. Game
‘DOMINOE”
Guys, to conclude the lesson let’s play
dominoes. The game starts with the word
START and ends with the word FINISH.
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Conclusion. Game ‘DOMINOE” Guys, to conclude the lesson let’s play dominoes. The game starts with the word START and ends with the word FINISH.
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Reflection
Blob’s Tree
Hometask:
Do exercise 3.4 (4,5) on page 78
Learn terms
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Reflection Blob’s Tree Hometask: Do exercise 3.4 (4,5) on page 78 Learn terms
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