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FORCE ON A CURRENT CARRYING CONDUCTOR (experiment to show force on beams…
FORCE ON A CURRENT CARRYING CONDUCTOR
mechanisms
current carrying conductor in magnetic field warps field lines
field lines want to straighten out naturally
causes a catapult-like action on the wire
creates a force
direction given by Fleming's left-hand rule
Fleming's left-hand rule
thumb: direction of force
index finger: magnetic field
middle finger: direction of current
reversing direction of force
reversing direction of current
reverse direction of the field
experiment to show force on beams of charged particles
electron gun creates beams of electrons
screen coated with fluorescent material that glows when struck by electrons
force also exerted on charged particles moving in a magnetic field
current passed through coils to create magnetic field
charged particles deflect
direction of electron beam opposite to conventional current