Physics Definitions

Electric field

a region in space where a charged object experiences a force

Coulomb's Law

the force between two charges is directly proportional to the product of the charges and inversely proportional to the distance between the charges squared

Potential difference

the work done per unit positive charge

Current

the rate of flow of charge

Ohm's Law

Current through a conductor is directly proportional to the potential difference across the conductor at constant temperature

Resistance

a material's opposition to the flow of electric current

Vector

a physical quantity that has both magnitude and direction

Scalar

a physical quantity that has magnitude only

Resultant vector

the single vector which has the same effect as the original vectors acting together

Distance

the length of path travelled

Displacement

a change in position

Speed

the rate of change of distance

Velocity

the rate of change of displacement

Acceleration

the rate of change of velocity