Electricity Test Revision Flashcards
1
Q
Peak Voltage =
A
number of boxes from center * y-gain setting
2
Q
Period (T) =
A
number of boxes for one wave * time-base setting
3
Q
Frequency =
A
1/T
4
Q
e.m.f =
A
V + Ir
5
Q
e.m.f graphs
A
y-intercept=e.m.f
Gradient=-r
x-intercept=short circuit current
6
Q
what is meant by 12.8V e.m.f?
A
12.8J of energy is gained by 1 coulomb of charge passing through the battery.
7
Q
Why would a wire have a large diameter?
A
To prevent overheating
8
Q
Why does charging current decrease as the battery charges?
A
The e.m.f. of the battery
increases.
Difference between the two
e.m.f.s decreases
9
Q
A
