Electricity-equations Flashcards
1
Q
What equation links power(watts), energy (joules) and time (seconds)?
A
Power=energy transferred/time
2
Q
What equation links charge (Q), current (I) and time?
A
Q=It
3
Q
What equation links potential difference (V), current (I) and resistance (ohms)?
A
V=IR
4
Q
What equation links energy (joules), potential difference (V) and charge (Q)?
A
E=VQ
5
Q
What equation links power (W), current (I) and potential difference (V)?
A
P=IV
6
Q
What equation links power (W), current (I) and resistance (ohms)?
A
P=I*2 x R
7
Q
What equation links energy, power and time
A
E=Pt
8
Q
Efficiency?
A
(Output power/Input power) x 100
9
Q
How do you work out the time period on an oscilloscope?
A
Squares for one complete wave x horizontal sweep time
10
Q
How do you work out the frequency on an oscilloscope?
A
1/period
