Chapter 6 CQ

• Two horizontal wires with identical currents carry currents directly towards you.  As viewed from your position, magnetic field 1 m to the right from the right wires is:

  Directed up
• A positive charge moves due east in the area, where magnetic field is directed due south. The force acting on this charge is directed:

  down
• A long wire carries current towards east. A positive charge moves westward and just north from the wire. What is direction of a force experienced by this charge?

  North
• A long straight wire carries current to the north in the area where magnetic field is directed to the south. What is direction of the force acting on the wire due to magnetic field?

  zero
• A long straight wire carries current due east in an external magnetic field of such strength that it allows this wire to levitate. What is direction of external magnetic field?

  North
• Negative charge –q is moving due east in magnetic field directed up. The force exerted by magnetic field on this charge is directed

  North
• Consider charge q, which at rest. What field will you use to accelerate this charge from rest?

  Electric field