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Homework Statement
A magnetic field of 1.4 T [N] is 4.0 m wide. A very long wire crosses the field.
a) If the current in the wire is 2.0 A [W], find the magnetic force on the wire.
b) What will happen to the force on the wire if
i) The wire is rotated slightly in the horizontal plane?
ii) The current is doubled?
iii) The magnetic field is reversed?
Homework Equations
F_m=ILB
The Attempt at a Solution
a)
a) F_m=ILB
F_m=(-2.0)(4.0)(1.4) F_m=-11.2N=11N
F_m=11N [down]
Therefore the magnetic force on the wire is 11N [down]
b)
i) Since the wire is no longer in a 90 degree angle the magnetic force will decrease and the angle will change
ii) The magnetic force will double and the current will move twice as fast.
iii) The direction of the force will reverse.
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