Fleming's Left-Hand Rule (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards

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Fleming's Left-Hand Rule
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Purpose of Fleming's left-hand rule

Shows force on wire from current & magnetic field

Index finger in Fleming's left-hand rule

Direction of magnetic field (N to S pole)

Middle finger in Fleming's left-hand rule

Direction of current

Thumb in Fleming's left-hand rule

Direction of force on wire

Angle between directions in Fleming's rule

90°90°

What Fleming's left-hand rule helps find

Unknown factor (usually direction of force)

Type of current in Fleming's left-hand rule

Conventional (opposite to electron flow)

Formula for force on wire in magnetic field

F=BILF = BIL

FF in formula F=BILF = BIL

Force in newtons (N)

BB in formula F=BILF = BIL

Magnetic flux density in tesla (T)

II in formula F=BILF = BIL

Current in amperes (A)

LL in formula F=BILF = BIL

Length in metres (m)

Unit of magnetic flux density

Tesla (T)

Definition of magnetic flux density

Number of flux lines per metre squared

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