Please enable JavaScript.
Coggle requires JavaScript to display documents.
electromagnetism (electric motors (Fleming's left hand rules) (theory,…
electromagnetism
electric motors (Fleming's left hand rules)
B-magnetic field
I-dirction of current flow
F-force
theory
the wire which current will experience forces n magnetic field
Lenz's law
the direction of the induced current oppose the change causing it
Generator
two ways
move a magnet inside coil of wire
move a wire through a magnet field so that it cuts through lines of magnetic flux.
right hand rules
transformer (change the voltage)
Np/Ns=Vp/Vs
VpIp=VsIs
steps
the iron core will transfer the changing magnetic field into secondary coil
the changing magnetic field pass through the secondary coil, then the secondary coil will induce the alternating voltage
primary coil will generate changing magnetic field
transformers can be used to change the voltage of an a.c supply
high-voltage transmission of electricity
to reduce energy loss
