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According to FlemmingтАЩs left-hand rule, the Middle finger, Index finger, and thumb denotes the directions of ________, ________, and ________ respectively.
Current, Magnetic Feild, and Force
Force, Magnetic Feild, and Current
Force, Current, and Magnetic Feild
Magnetic Feild, Current, and Force
Current, Magnetic Feild, and Force
Quick Trick: Use the FBI mnemonic: Thumb = Force (F), Index finger = B-field / Magnetic Field (B), Middle finger = I / Current (I). Matching middle, index, and thumb gives Current, Magnetic Field, and Force.
Use the FBI mnemonic: Thumb = Force (F), Index finger = B-field / Magnetic Field (B), Middle finger = I / Current (I). Matching middle, index, and thumb gives Current, Magnetic Field, and Force.
Recall Fleming's Left-Hand Rule Mnemonic
Remember the standard mnemonic 'Father, Mother, Child' or 'FBI' where F stands for Force (Thumb), B stands for Magnetic Field (Index finger), and I stands for Current (Middle finger).
Map Fingers to Physical Quantities
Match the Order in Question
The question asks for Middle finger, Index finger, and Thumb in that specific order. This corresponds to Current, Magnetic Field, and Force.
B: Reverses the positions of Thumb and Middle finger. C: Reverses the positions of Thumb and Index finger. D: Swaps the positions of Index and Middle fingers.
A is correct because the Middle finger represents Current, the Index finger represents the Magnetic Field, and the Thumb represents Force.
For motor action use Left-Hand Rule (FBI), while for generator action (induced current) use Right-Hand Rule with the exact same finger assignments.