Electric Motors (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
📚Flashcards
Practise the cards
13 cards from this deck
ShowHide
Practise the cards
13 cards from this deck
What force does current-carrying coil experience in magnetic field?
What force does current-carrying coil experience in magnetic field?
A force that causes rotation
What type of motor uses a split-ring commutator?
What type of motor uses a split-ring commutator?
DC electric motor
What connects coil ends in DC motor?
What connects coil ends in DC motor?
Split-ring commutator
Power supply type for DC motor
Power supply type for DC motor
Direct current (DC)
What does current create around coil?
What does current create around coil?
Magnetic field
What interacts with permanent magnet field in motor?
What interacts with permanent magnet field in motor?
Magnetic field from current in coil
Rule to find force direction on coil
Rule to find 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
Position where coil stops rotating momentarily
Position where coil stops rotating momentarily
Vertical position
How often does commutator change current direction?
How often does commutator change current direction?
Every 180°
Why does commutator reverse current?
Why does commutator reverse current?
Ensures torque continues in same direction
Component connecting rotating & stationary motor parts
Component connecting rotating & stationary motor parts
Carbon brushes
What keeps coil rotating after half spin?
What keeps coil rotating after half spin?
Reversed current