Electromagnetism Flashcards
Force on a current carrying conductor=
F=BIL Sin theta
Force on a charged particle traveling at right angles to a uniform magnetic field=
F=BQV
define magnetic flux
amount of magnetic field that passes through an area
Flux =?
Flux= BAcos theta
what is flux linkage
flux x number of coils
what is the magnitude of induced emf in a conductor?
The magnitude of induced emf in a conductor is equal to the rate of change of flux linkage or the rate at which the conductor cuts a magnetic field
What is Lenz’s Law?
the direction of induced current or emf is always opposite to the change that caused it
what is faradays law?
induced emf is equal to the rate of change of flux linkage
ideal transformer equation
nₛ / nₚ = Vₛ / Vₚ = Iₚ / Iₛ
properties of iron core in transformers
laminated core reduce power wastage
soft iron to increase conductivity
