5.1 alternating current Flashcards
(8 cards)
1
Q
What is direct current?
A
Current that flows in One Direction
2
Q
What is alternating current?
A
Current that repeatedly reverses its direction of flow
3
Q
What wire does the main circuit have?
A
Live wire
4
Q
What charge does a live wire have every cycle?
A
Positive and negative alternately
5
Q
How many volts does a neutral wire have?
A
0 V
6
Q
How do you measure the frequency of an alternating current?
A
Measure the time period of the waves, then use the equation
Frequency = 1 / time taken for one cycle
7
Q
What are step up Transformers?
A
An electrical device used to step up the size of an alternating potential difference
8
Q
What is a step down transformer?
A
An electrical device that is used to step down the size of an alternating potential difference
