## Complete list of all GCSE Physics Equations

Below is a complete list of all of the GCSE Physics Equations that you could need during your exams.

## GCSE Physics Equations by Exam Board

This includes all major exam boards – AQA, Edexcel and OCR. There are some minor differences between exam boards and so you can access complete equation lists for each at the below links.

efficiency = useful power output/total power input |

period = 1/frequency |

magnification = image height/object height |

wave speed = frequency × wavelength |

energy transferred = power × time |

efficiency = useful energy transferred/total energy transferred |

charge = current × time |

potential difference = current × resistance |

potential difference = work done (energy transferred)/charge |

power = energy/time |

energy transferred (work done) = charge flow × potential difference |

power = potential difference × current |

power = (current)2 × resistance |

HT force = magnetic flux density × current × length of conductor |

potential difference across primary coil × current in primary coil = potential difference across secondary coil × current in secondary coil |

HT potential difference across primary coil/potential difference across secondary coil = number of turns in a primary coil/number of turns in secondary coil |

weight = mass × gravitational field strength |

average speed = distance/time |

acceleration = change in speed/time taken |

(final speed)2 – (initial speed)2 = 2 × acceleration × distance |

HT momentum = mass × velocity |

HT change in momentum = resultant force × time for which it acts |

moment of a force = force × distance (normal to direction of the force) |

force = mass × acceleration |

work done = force × distance (along the line of action of the force) |

kinetic energy = 0.5 × mass × (speed)2 |

gravitational potential energy = mass × gravitational field strength × height |

power = energy transferred/time |

density = mass/volume |

change in internal energy = mass × specific heat capacity × change in temperature |

energy to cause a change of state = mass × specific latent heat |

force exerted by a spring = extension × spring constant |

energy stored in a stretched spring = 1/2 × spring constant × (extension)2 |

pressure = force normal to a surface/area of that surface |

for gases: pressure × volume = constant |

(for a given mass of gas and at a constant temperature) |

HT pressure due to a column of liquid = height of column × density of liquid × gravitational field strength |

energy transferred = current × voltage × time |

refractive index = sin(angle of incidence) / sin(angle of refraction) |

sin(critical angle) = 1/refractive index |

efficiency = useful energy output/total energy output x 100% |

pressure/temperature = constant |

Orbital speed = 2 x π x orbital radius/time period |

Change in wavelength/reference wavelength = velocity of a galaxy /speed of light |