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5.2 Voltage sources
5.2 Voltage sources
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Slide 1:
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physics
Middelbare school
havo, vwo
Leerjaar 2
This lesson contains
18 slides
, with
interactive quizzes
and
text slides
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Lesson duration is:
45 min
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5.2 Voltage sources
Slide 1 - Slide
Voltage source
A battery always states what voltages it supplies.
A battery supplies electrical energy.
The
current
tells you how many charged particles flow past every second.
The
voltage
tells you how much electrical energy each particle is carrying.
Slide 2 - Slide
Fig. 14
You can compare the transport of electrical energy to the transport of petrol.
Current = trucks
Voltage = petrol
Or a central heating
current = water, voltage = heath
Slide 3 - Slide
Connecting batteries
If you connect batteries in series (behind each other), you can add their voltages together.
Slide 4 - Slide
Voltages
mains
voltage = 230 V
Safe voltages = voltages untill 24 V
You can convert the mains voltage with a
transformer
.
Slide 5 - Slide
Study Skills 7 on page 309
Slide 6 - Slide
Chemical voltage sources
Batteries are chemical voltage sources because the voltage is generated by chemical reactions.
In rechargeable batteries you can make this reaction go in the opposite direction (recharge the battery).
Batteries are small-scale chemical waste.
Slide 7 - Slide
excercises:
17 -> 20
25
Slide 8 - Slide
17 Why do dynamos not state the voltage they deliver?
A
They were built in Russia
B
It depends on the light attached to it
C
It depends on the type of bike
D
It depends on the movement of the dynamo
Slide 9 - Quiz
18a. Read off
the
voltage
A
3 V
B
27 V
C
2,7 V
D
13,5 V
Slide 10 - Quiz
18b. Read off
the
voltage
A
18 V
B
90 V
C
9 V
D
1.8 V
Slide 11 - Quiz
19.
Slide 12 - Slide
Slide 13 - Slide
20a. What's
the voltage?
A
6 V
B
4.5 V
C
3 V
D
1.5 V
Slide 14 - Quiz
20b. What's
the voltage?
A
6 V
B
0 V
C
3 V
D
1.5 V
Slide 15 - Quiz
20c. What's
the voltage?
A
6 V
B
4.5 V
C
0 V
D
1.5 V
Slide 16 - Quiz
20d. What's
the voltage?
A
6 V
B
0 V
C
3 V
D
1.5 V
Slide 17 - Quiz
next week : small test 5.1 & 5.2
Slide 18 - Slide
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