The Motor Effect (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards
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Practise the cards
13 cards from this deck
What happens when a coil carries current in a magnetic field?
What happens when a coil carries current in a magnetic field?
Coil experiences a force and can rotate
Type of motor with coil between magnetic poles
Type of motor with coil between magnetic poles
DC electric motor
What does each coil end connect to in a DC motor?
What does each coil end connect to in a DC motor?
Split-ring commutator
What does current flowing through the coil create?
What does current flowing through the coil create?
Magnetic field
Result when coil's field meets permanent magnet's field
Result when coil's field meets permanent magnet's field
Force is exerted on the coil
Rule to find direction of force on current-carrying wire
Rule to find direction of force on current-carrying wire
Fleming's left-hand rule
Effect of opposite forces on each side of coil
Effect of opposite forces on each side of coil
Coil rotates
At what position does the coil initially stop rotating?
At what position does the coil initially stop rotating?
Vertical position
How often does the commutator change current direction?
How often does the commutator change current direction?
Every
Purpose of split-ring commutator
Purpose of split-ring commutator
Changes current direction to maintain torque direction
Components connecting rotating & stationary motor parts
Components connecting rotating & stationary motor parts
Carbon brushes
What maintains coil rotation after half spin?
What maintains coil rotation after half spin?
Reversed current
Fields that interact to produce force on coil
Fields that interact to produce force on coil
Current's magnetic field & permanent magnet's field