# GCSE Physics Equations

## 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

## OCR Physics B Equation Sheet  