TV3 Ch1 Electricity

TV3 Ch1 Electricity
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Slide 1: Tekstslide
NatuurkundeMiddelbare schoolvwoLeerjaar 3

In deze les zitten 27 slides, met interactieve quizzen en tekstslides.

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TV3 Ch1 Electricity

Slide 1 - Tekstslide

1.1 Generating Electrical energy

Slide 2 - Tekstslide

Induction of a voltage means
A
Creating a voltage out of nothing
B
Any kind of generation of voltage
C
Generating a voltage through electromagnetism
D
Using heat to generate a voltage

Slide 3 - Quizvraag

A voltage induced in a generator is an:
A
Alternating voltage
B
Direct voltage
C
Flat voltage
D
High voltage

Slide 4 - Quizvraag

Some magnets have a core of soft iron. This core:
A
offers support to the windings of the coil
B
is like a storage for magnetism
C
enhances the magnetic field
D
werves no specific purpose

Slide 5 - Quizvraag

Electrical power is:
A
Energy per unit of time
B
a synonyme for energy
C
Energy times time
D
the strength of a machine

Slide 6 - Quizvraag

A power of 870 MW is:
A
870,000 J
B
870,000 W
C
870,000,000 J
D
870,000,000 W

Slide 7 - Quizvraag

An engine offering 6 kJ in one minute has a power of:
A
10 W
B
10 J/s
C
100 W
D
100 J/s

Slide 8 - Quizvraag

1.2 Transporting energy

Slide 9 - Tekstslide

The correct and complete supply chain of electrical energy looks like:
A
power station - grid - house
B
house - power station - transformer substation
C
power station - grid - transformer substation - house
D
power station - transformer substation - grid - house

Slide 10 - Quizvraag

Which statement is true for an AC voltage:
A
Effective voltage > Peak voltage
B
Effective voltage < Peak voltage
C
Effective voltage = Peak voltage
D
AC voltage doesn't have an effective voltage.

Slide 11 - Quizvraag

A transformer with more windings on the secondary coil than on the primary coil ...
A
makes the voltage go up
B
makes the voltage go down
C
makes the current go up
D
makes the current go down

Slide 12 - Quizvraag

For minimal loss of energy during transport:
A
voltage should be high
B
voltage should be low
C
current should be high
D
current should be low

Slide 13 - Quizvraag

Which formula is true:
A
Vp/Vs = Np/Ns
B
Vp/Vs = Ns/Np
C
Ip/Is = Np/Ns
D
Ip/Is = Ns/Np

Slide 14 - Quizvraag

1.3 Electricity in the home

Slide 15 - Tekstslide

In one 'group' ...
A
the voltage is the same everywhere
B
the voltage can vary
C
the current is the same everywhere
D
none of the above

Slide 16 - Quizvraag

Every socket is at least connected to:
A
A live wire and a null wire
B
A loaded wire and a neutral wire
C
A charged wire and a null wire
D
A live wire and a neutral wire

Slide 17 - Quizvraag

The symbol for current, and the symbol for its unit are:
A
I and W
B
I and J
C
I and A
D
P and W

Slide 18 - Quizvraag

The current through each of the
light bulbs is 1.0 A. The current
coming from the source is:
A
0.5 A
B
1.0 A
C
1.5 A
D
2.0 A

Slide 19 - Quizvraag

A 5 W desk lamp is switched on for approximately 2 hours. How much electric energy is 'used'?
A
3.6 kW
B
36 kW
C
3.6 kJ
D
36 kJ

Slide 20 - Quizvraag

1 J = . . .
A
1/3600 kWh
B
3600 kWh
C
1/3600000 kWh
D
3600000 kWh

Slide 21 - Quizvraag

Electricity and safety

Slide 22 - Tekstslide

A current of 20-50 mA . . .
A
is not harmful at all
B
causes some tingling sensations
C
can cause some physical problems
D
is potentially deadly

Slide 23 - Quizvraag

A dry skin has
A
zero contact resistance
B
lower contact resistance than wet skin
C
the same contact resistance as wet skin
D
larger contact resistance than wet skin

Slide 24 - Quizvraag

What voltage starts to get harmful for a human
A
from 1.5 V onwards
B
from 6 V onwards
C
from 30 V onwards
D
from 230 V onwards

Slide 25 - Quizvraag

A circuit breaker . . .
A
compares the incoming current to the outgoing current
B
measures the incoming current
C
measures the outgoing current
D
is a manually operated switch

Slide 26 - Quizvraag

Which one is
the earthing
(grounding) wire?
A
The black one
B
The brown one
C
The yellow/green one
D
The blue one

Slide 27 - Quizvraag