1418068
IGCSE Physics Magnets and Currents
- DC motor
- Commutator
- allows motor to
keep turning
- switch + to - ,
vice versa
- allows motor to
keep turning
- drill, whisk,
handheld fans
- Commutator
- 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
- Changing magnetic field generates
or induces voltage in wire or cell
- step up transformer
step down transformer
- transforms one voltage into
a higher or lower voltage
- Attraction and Repulsion
- N attracted to S
- S and S repel each other
- N and N repel each other
- N attracted to S
- Generator/dynamo
- works by rotating coil in
a magnetic field
- slip-ring communicator
- produces alternating current
- produces alternating current
- works by rotating coil in
a magnetic field
- right-hand grip rule
- into page
- cross on arrow
- cross on arrow
- out of page
- arrowhead
- arrowhead
- into page
- Fleming's left hand rule
- FMC
- for d.c.
- generator
- right-hand rule
- right-hand rule
- generator
- FMC
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