Physics: Magnetic Fields Chapter 28

What is the direction of the magnetic field produced by a long straight wire carrying a current?

What is the direction of the magnetic field due to a current-carrying wire at a point below the wire, if the current is flowing from north to south?

What is the orientation of the north pole of a magnetic compass needle placed near a current-carrying wire, if the current is flowing from east to west?

What is the shape of the magnetic field lines around a long straight wire carrying a current?

What happens to a magnetic compass needle placed near a current-carrying wire?

In which direction do the magnetic field lines emerge from a current-carrying wire?

What is the unit of a magnetic field?

What is the direction of the magnetic force on a charged particle?

If an electron moves in the negative x direction, through a uniform magnetic field in the negative y direction, what is the direction of the magnetic force on the electron?

What is the direction of magnetic field lines at a point?

When is the magnetic force on a charged particle in the direction of its velocity?

What is the direction of the magnetic force on a charged particle moving in a uniform magnetic field?

What is the direction of the magnetic dipole moment of a current-carrying loop of wire?

If a uniform magnetic field is in the positive x direction, what is the direction of the magnetic torque on the loop?

What is the condition for the potential energy of a loop of current-carrying wire to be a minimum in a uniform magnetic field?

For which orientation of a magnetic dipole in a uniform magnetic field is the potential energy the greatest?

What is the direction of the magnetic field in which the magnetic torque on the loop is zero?

What is the relationship between the magnetic dipole moment and the magnetic field when the potential energy is a minimum?