photon and elctron Flashcards
1
Q
Power
A
the rate at which work is done
2
Q
Potential difference
A
work done per unit positive charge
3
Q
ohms law
A
current through a conductor is directly proportional to the potential difference across the conductor at consatnt temprature
4
Q
resistance
A
material opposition to the flow of electric current
5
Q
emf
A
total energy supplied per coulumb of charge by cell
6
Q
threshold frequency
A
the minimum frequency of incident radiation at which electrons are emitted from a particular metal
7
Q
work function
A
minimum amount amount of energy needed to emit an electron from the surface of a metal
8
Q
current
A
the rate of flow of charge
9
Q
photoelctric effect
A
when a metal surface is exposed to elctromagnetic radiation with sufficient energy, they abosrb photons of enregy and emit electrons.
