electricity - electrical calculations Flashcards
power, energy, charge, (peak) potential difference, time period,
1
Q
what is power and how is it calculated (all)
A
the rate at which energy is transferred
P = IV
POWER = CURRENT x VOLTAGE
P = I²R
POWER = CURRENT² X RESISTANCE
P = V²/R
POWER = POTENTIAL DIFFERENCE² ÷ RESISTANCE
2
Q
potential difference equation
A
V = IR
POTENTIAL DIFFERENCE = CURRENT X RESISTANCE
3
Q
energy equation (all)
A
E = Pt or E = IVt
ENERGY = POWER X TIME
E = ItV
ENERGY = CURRENT X TIME X PD
E = QV
ENERGY = CHARGE X VOLTAGE
4
Q
charge equation
A
Q = It
CHARGE = CURRENT X TIME
5
Q
(peak) potential difference equation
A
(peak) potential difference = amplitude x y-sensitivity setting
6
Q
time period equation
A
time period = wavelength x time-base setting
