direct and alternating current Flashcards
1
Q
what is the current from a cell?
A
direct current
2
Q
what current is the mains electricity?
A
alternating current
3
Q
what does alternating current do?
A
change direction
4
Q
benefit of alternating current?
A
easy to use a transformer
5
Q
which frequencey is alternating current?
A
50 hertz - pd 230 v
6
Q
what is an oscilliscope?
A
shows alternating current - height shows max pd difference
7
Q
how to work out the frequencey?
A
minus two numbers at the bottom - use the equation
