Equations - Paper 1 Flashcards
State the equation that links current, charge and time
Charge (C) = Current (A) x time (s)
Q = I t
State the equation that links potential difference, current and resistance
Potential difference (V) = Current (A) x resistance (ohms)
V = I R
State the equation that links power, potential difference and current
Power (W) = Potential difference (V) x current (A)
P = V I
State the equation that links power, resistance and current
Power (W) = Current² (A) x resistance (ohms)
P = I²R
State the equation that links power, energy and time
Power (W) = Energy transferred(J) / time (s)
P = E/t
State the equation that links Energy, charge and potential difference
Energy (J) = Charge (C) x potential difference (V)
E = Q V
State the equation that links density, mass and volume
Density (kg/m3) Mass (kg) / volume (m3)
d = m/v
State tje equation that links time period and frequency
T (s)= 1 / f (Hz)
State the equation that links work done, force and distance
Work done (J) = Force (N) x distance moved (m)
W = F D
State the equation that links resistance, potential difference and current
Resistance (ohms) = Potential difference (V) / Current (A)
R = V/I
State the equation for Efficiency?
Efficiency = Useful energy out/ Total Energy input
E= useful/input
State the equation for Kinetic energy?
Kinetic energy (J) = 1/2 x Mass (kg) x Velocity² (m/s)
Ek=1/2mv²
State the equation for Gravitational potential energy?
GPE (J) = Mass (kg) x Gravitational field strength (N/kg) x Height (m)
Ep=mgh
State the equation for Elastic potential energy? (this is on the formula sheet)
Elastic potential energy (J) = 1/2 x Spring constant (N/m) x Extension² (m)
Ee=1/2ke² (this is on the formula sheet)
State the equation for Specific heat capacity (SHC)? (this is on the formula sheet)
SHC (J/kgOC) = Energy (J) / mass (kg) x temperature change (OC)
c = E / (m x Ø) (this is on the formula sheet)
