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1418068
IGCSE Physics Magnets and Currents
Descrição
IGCSE Physics chapter 9 revision
Mapa Mental por
nadiaNM
, atualizado more than 1 year ago
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nadiaNM
quase 10 anos atrás
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Resumo de Recurso
IGCSE Physics Magnets and Currents
DC motor
Commutator
allows motor to keep turning
switch + to - , vice versa
drill, whisk, handheld fans
Transformers
transforms one voltage into a higher or lower voltage
primary coil
secondary coil
works by electromagnetic induction
Changing magnetic field generates or induces voltage in wire or cell
magnetic field around the coil is changing
step up transformer step down transformer
Attraction and Repulsion
N attracted to S
S and S repel each other
N and N repel each other
Generator/dynamo
works by rotating coil in a magnetic field
slip-ring communicator
produces alternating current
right-hand grip rule
into page
cross on arrow
out of page
arrowhead
Fleming's left hand rule
FMC
for d.c.
generator
right-hand rule
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