Physics AS unit 1 definition
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Define potential difference between two points
The energy converted from electrical potential enery to some other form per coulomb of charge flowing from one point to another
The number of free electrons per unit volume
Define Ohm's law
The current flowing through a metal wire at constant temperature is proportional to the p.d across it
Define Newton's third law
If object A exerts a force on object B, then B exerts an equal and opposite force on A.
Define Centre of Gravity
The point where the entire weight of the body is considered to act.
Define Mean speed
Total distance travelled÷total time taken
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