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The force on a wire is a maximum of 8.50×10−2 N when placed between the pole...

The force on a wire is a maximum of 8.50×10−2 N when placed between the pole faces of a magnet. The current flows horizontally to the right and the magnetic field is vertical. The wire is observed to "jump" toward the observer when the current is turned on.

a.)

What type of magnetic pole is the top pole face?

What type of magnetic pole is the top pole face?

South pole

North pole

b.)

If the pole faces have a diameter of 18.0 cm , estimate the current in the wire if the field is 0.100 T .

Express your answer to three significant figures and include the appropriate units.

c.)

If the wire is tipped so that it makes an angle of 15.0 ∘ with the horizontal, what force will it now feel? [Hint: What length of wire will now be in the field?]

Express your answer to three significant figures and include the appropriate units.

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