Fleming's left or right hand rule???

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chickenwing2291
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I see in many physics gcse revision guides that Fleming's hand rule uses your left hand but in others it's the right. Obviously can't be both bc they're mirrored so which is the one I'm supposed to use in which scenarios?
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Muttley79
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(Original post by chickenwing2291)
I see in many physics gcse revision guides that Fleming's hand rule uses your left hand but in others it's the right. Obviously can't be both bc they're mirrored so which is the one I'm supposed to use in which scenarios?
Fleming's left-hand rule is used for electric motors, while Fleming's right-hand rule is used for electric generators.
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chickenwing2291
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(Original post by Muttley79)
Fleming's left-hand rule is used for electric motors, while Fleming's right-hand rule is used for electric generators.
I don't fully understand the difference. I read that electric motor creates a force from electrical energy whereas a generator converts mechanical energy into electrical energy, but if both involve force current and magnetic field then why is one in the opposite direction of the other? In an exam how would you be able to tell which hand to use if it didn't specifically say 'generator' or 'motor'? Thanks for replying
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Muttley79
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(Original post by chickenwing2291)
I don't fully understand the difference. I read that electric motor creates a force from electrical energy whereas a generator converts mechanical energy into electrical energy, but if both involve force current and magnetic field then why is one in the opposite direction of the other? In an exam how would you be able to tell which hand to use if it didn't specifically say 'generator' or 'motor'? Thanks for replying
I teach Maths but from what I remember it's usually clear in the question which to use. Maybe find some examples?

http://www.bbc.co.uk/schools/gcsebit...ct/revision/4/
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