Formulas Flashcards
1
Q
Power (electricity)
A
P=IV=V²/R=I²/R
2
Q
Ohm’s Law
A
I = V/R V = IR R = V/I
3
Q
Energy (electricity)
A
E = P•t
4
Q
Voltage equation
A
V = potential energy/charge V = U/q
5
Q
Current equation
A
Current = charge/time I = q/t
6
Q
Gravitational force
A
F = Gm₁m₂/r²
7
Q
Electrical force
A
F = kq₁q₂/r²
8
Q
Resistance formula
A
Resistance = resistivity(length/cross-sectional area)
9
Q
Speed of wave on a string
A
v = rt.(tension/linear density)
10
Q
Wave speed
A
v = wavelength/period v = wavelength • frequency
