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9 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Dc motor |
When electric current passes through a coil in a magnetic field. The magnetic force produces a torque which turns to dc motor |
W e c |
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Lenz law |
An induced electric current flows in a direction such that the current opposes the change that induced it Right hand grip rule - fingers are in direction of field opposing the change |
A I e c R h g |
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Faradays law |
Describes how an electric current produces a magnetic field through emf and mag flux |
D h a e c p |
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Dc generator |
Split ring commutator Ring changes direction of output every half turn |
S r c R c d o o |
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AC motor |
Current is passed through a coil, generating torque on the coil Only runs smoothly in sine wave Slip rings and brushes |
C I p t O r s S r & b |
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Commutator |
A device for reversing the direction of flow of electric current Reverses the direction when coil is perpendicular to the mag field |
A d f r t R d w c i p |
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Emf |
Electromotive force Measured in volts |
E f M i v |
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Ac generator |
Converts mechanical energy - ac North and South Pole Rectangular coil is the armature Coil connected to slip rings and brushes Rotation of coil changes the magnetic flux and generates volts |
C m e N & s p R c = a C c t s r R o f c |
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ac induction motor |
produces a rotating mag field outside the motor by the AC reversing its polarity |
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