Magnetic Fields and Forces: Further Exploration (VCE SSCE Physics): Flashcards

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Magnetic Fields and Forces: Further Exploration
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Formula for force on current-carrying wire in magnetic field

F=nIlBF = nIlB

When does wire experience maximum magnetic force?

When perpendicular to the magnetic field

Purpose of right-hand slap rule

Determines direction of force on current-carrying wire

Function of split ring commutator in DC motor

Reverses current every half rotation

Torque formula when force perpendicular to lever arm

τ=rF\tau = rF

Force on moving charged particle in magnetic field

F=qvBF = qvB

Path of charged particle in uniform magnetic field

Circular

Radius of circular path for charged particle in B-field

r=mvqBr = \frac{mv}{qB}

Electric vs magnetic fields in particle accelerators

Electric accelerates; magnetic directs

Velocity in crossed field velocity selector

v=EBv = \frac{E}{B}

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