Physics 7.2.2 Flashcards
The ‘Motor Effect’ Occurs When:
A Wire with Current Flowing Through it is Placed in a Magnetic Field, & Experiences a Force.
The Motor Effect is the Result of…
2 Interacting Magnetic Fields.
As a Result of the Interactions of the 2 Magnetic Fields, the Wire will Experience a ___. This is the ___ Effect.
Force, Motor.
Explain the ‘Motor Effect’: (4)
-2 Magnetic Fields Interact:
-The Magnetic Field Produced Around the
Wire Due to the Current Flowing Through
it.
-Magnetic Field into which the Wire is Placed. EG, Between 2 Magnets.
-This Causes a Force to Act on the Wire.
What are the Factors that Affect the Motor Effect’s Force? (3)
-The Size of the Force Exerted onto the Wire by the Magnetic Fields.
-The Strength of the Magnets.
-The Angle of the Wire to the Direction of the Magnetic Field Lines. eg Placing the Wire Perpendicular to the Magnetic Field Lines allows for the Maximum Force to Act on it.
How can you Increase the Size of the Force Exerted by the Magnetic Field on the Wire?
By Increasing the Current Flowing Through the Wire, the Magnetic Field Around the Wire will Increase.
At what Angle to the Direction of the Magnetic Field Lines should the Wire be Placed out for Maximum Interaction Between the 2 Magnetic Fields?
90’.
What will Happen if the 2 Magnetic Fields in the Motor Effect are Parallel?
If the 2 Magnetic Fields are Parallel, there will be no Interaction Between the 2 Magnetic Fields, & Therefore, no Force Produced.
Force Acting on Current-Carrying Wire (in the Motor Effect) = …
Magnetic Flux Density * Current in Wire * Length of Wire
For Maximum Force to Act on the Current-Carrying Wire in the Motor Effect, how Must it be Placed into the Magnetic Field Lines of the 2 Magnets?
The Current-Carrying Wire Must be Perpendicular to the MFL of the 2 Magnets.
