# 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/m^{3}) Mass (kg) / volume (m^{3})

d = m/v

State tje equation that links time period and frequency

T (s)= 1 / f (Hz)

State the equation for Boyle’s Law? (this is on the formula sheet)

pressure (Pa) x Volume (m^{3}) = constant

pV = constant (this is on the formula sheet)

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)

E_{k}=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)