You bring the north pole of one magnet close to the south pole of another magnet. Which of the following is/are true? Check all that apply.     The field lines move from the north pole of the one to toward the south pole of the other magnet.   There is an attractive force between the north pole of the one and the south pole of the other.   There is a repulsive force between the north pole of the one and the south pole of the other.   The field lines move from the south pole of the one to toward the north pole of the other magnet.

A student makes a short electromagnet by winding a wire 213 times around a non-conductive pipe with a radius of 0.0575 m. The coil is connected to a battery producing a current of 7.06 A in the wire. What is the magnitude of the magnetic dipole moment of this device

An electron with a kinetic energy of 1.04 x 104 eV is initially moving south in a uniform magnetic field of magnitude 488 G, directed east. Describe in detail the electron's trajectory, including its shape and orientation. the radius of the path   direction of initial force        shape of trajectory

A positive charge is moving downward in a uniform magnetic. The charge initially is deflected to the right. What is the direction of the magnetic field?

At New York City, the earth's magnetic field has a vertical component of 5.20 × 10-5 T that points downward (perpendicular to the ground) and a horizontal component of 1.80 × 10-5 T that points toward geographic north (parallel to the ground). What is the magnitude of the magnetic force on a 7.14-m long, straight wire that carries a current of 46.8 A perpendicularly into the ground? Number Units

Which of the following statements are true for magnetic field lines? a) Magnetic field lines point in the direction of the magnetic force acting on a charge. b) Magnetic field lines are close together in regions of space where the magnitude of the magnetic field is weak, and they are farther apart in regions where it is strong. c) Magnetic field lines can never intersect. d) Unlike enlectric field line, magnetic field lines are continuos. e) At every point in space, the magnetic field vector at that point is a tangent to the magnetic field line throught that point.

A student performed a trick using a bar magnet and a paper clip. The paper clip was attached to a piece of string that was taped to a table. The clip appears to float just below the magnet. Use what you have learned about magnetic fields to explain how the floating paper clip trick works. Use evidence and scientific reasoning to support your response.