Electric Motors (AQA GCSE Physics): Flashcards
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What causes rotation in electric motors?
What causes rotation in electric motors?
Current-carrying coil in magnetic field experiences force
Motor type using split-ring commutator
Motor type using split-ring commutator
DC electric motor
What each coil end connects to
What each coil end connects to
Split-ring commutator
What flowing current creates around coil
What flowing current creates around coil
Magnetic field
Which fields interact to exert force on coil?
Which fields interact to exert force on coil?
Current's field and permanent magnets' field
Rule for determining force direction on coil
Rule for determining force direction on coil
Fleming's left-hand rule
Forces on opposite sides of coil
Forces on opposite sides of coil
Upward on one side, downward on other
What causes the coil to rotate
What causes the coil to rotate
Opposite forces on different sides
Coil position when commutator switches current
Coil position when commutator switches current
Vertical position
How often commutator changes current direction
How often commutator changes current direction
Every
Purpose of split-ring commutator
Purpose of split-ring commutator
Keeps torque in same direction
Function of carbon brushes
Function of carbon brushes
Connect rotating and stationary parts, prevent tangling