Electricity formulas Flashcards
1
Q
Charge
A
Current x Time
2
Q
Voltage/ Potential difference
A
V= Energy x Charge
3
Q
Ohms law
A
V= I x R
4
Q
Electric power when voltage given
A
P= V x I
5
Q
Power when resistance given
A
P= I^2 x R
6
Q
Power in relation to energy and time
A
Power= Energy/Time
7
Q
The cross-sectional area of a wire
A
Area= Pi x r-square x L
8
Q
Resistance in relation to resistivity
A
R= (resistivity x length)/ A
9
Q
Conventional current movement
A
Positive to negative
10
Q
Electrons movement
A
Negative to positive
11
Q
Resistance in a series
A
Rt= R1+R2+R3
12
Q
Resistance in a parallel
A
1/Rt=1/R1+1/R2+1/R3
