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Homework answers / question archive / 1) Sketch the current and field lines surrounding the following magnets

1) Sketch the current and field lines surrounding the following magnets

Math

1) Sketch the current and field lines surrounding the following magnets.  Draw arrows on the compasses to show which way they’d be pointing.

 

 

  1. Complete the diagrams below by adding in the compass arrows based on the one compass given. Then determine which end of the wire is positive and which must be negative (label)

 

 

 

3. A 12 cm length of wire carrying a 30 A current is positioned between the pole faces of a magnet at an angle of ø = 60? as shown below. The magnetic field is approximately uniform at 0.90 T. What is the magnitude of the force on the wire?

4. A magnetic field is perpendicular to an electric field.

a) What velocity does an electron need to have in order to travel straight through the crossed E and B fields, given that E = 1.0 x 105 N/C and B = 0.40 T?

b) What electric field is needed to balance the effects of an electron traveling with velocity 3.0 x 105 m/s through a magnetic field 0.5 T in strength?

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