The National Grid
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Lesson duration is: 100 minItems in this lesson
Slide 1 - Slide
What is Ohm's Law?
A
P = IV
B
I = VR
C
V = IR
D
R = IV
Slide 2 - Quiz
Electric current created chemically is called ...
A
Chemical current
B
Alternating Current
C
Mains current
D
Direct current
Slide 3 - Quiz
Mains electricity is called ...
A
Direct current (DC)
B
Chemical current (CC)
C
Mains current (MC)
D
Alternating current (AC)
Slide 4 - Quiz
What is the potential difference of mains electricity?
A
120V
B
230V
C
180V
D
160V
Slide 5 - Quiz
What is the frequency of mains electricity
A
50 Hz
B
230 Hz
C
60 Hz
D
120 Hz
Slide 6 - Quiz
Slide 7 - Slide
Slide 8 - Video
Slide 9 - Slide
Slide 10 - Slide
Why do we use step-up transformers?
Slide 11 - Open question
What does the step-up transformer do to the potential difference?
A
Decrease the pd
B
increase the pd
C
keeps the pd the same
D
all of the above
Slide 12 - Quiz
What does the step-up transformer do to the current?
A
Decreases the current
B
Increases the current
C
Keeps the current the same
D
None of the above
Slide 13 - Quiz
What does the step-down transformer do to the potential difference?
A
It increases the pd
B
It keeps the pd the same
C
it decreases the pd
D
It increases and decreases the pd
Slide 14 - Quiz
Why do we use step-down transformers?
A
To make things complicated
B
To make the potential difference safe to use for the consumer
C
To make the potential difference unsafe to use for the consumer
D
To play with the potential difference
Slide 15 - Quiz
What does the step-down transformer do to the current?
A
Its decreases the current
B
It keeps the current the same
C
It does nothing to the current
D
It increases the current
Slide 16 - Quiz
What is the potential difference for the consumer?
Slide 17 - Open question
What is the frequency of mains electricity?
Slide 18 - Open question
Slide 19 - Slide
What name is given to the network of cables and transformers that links power stations to consumers?
Slide 20 - Open question
What does a step-up transformer do?
Slide 21 - Open question
Most of the World's electricity is generated in power stations that burn fossil fuels. State one environmental problem that burning fossil fuels produce.
Slide 22 - Open question
Explain why step-up transformers are used in electricity distribution?
Slide 23 - Open question
Name the 3 wires including their colour code as found in a 3-pin plug
Slide 24 - Open question
Which wire contains the fuse?
