Definitions 4 Flashcards
Resistance
A material’s opposition to the flow of electric current.
emf
The total energy supplied per coulomb of charge by the cell.
Magnetic flux linkage
The product of the number of turns on the coil and the flux through the coil.
Faraday’s law of electromagnetic induction
The emf induced is directly proportional to the rate of change of magnetic flux (flux linkage)
Lenz’s law
The induced current flows in a direction so as to set up a magnetic field to oppose the change in magnetic flux.
Diode
A component that only allows current to flow in one direction.
Threshold (cut-off) frequency
The minimum frequency of incident radiation at which electrons will be emitted from a particular metal.
Work function
The minimum amount of energy needed to emit an electron from the surface of a metal.
