In the figure, a wire carrying current into the plane of the figure is between the north and south poles of two bar magnets. (Figure) What is the direction of the force exerted by the magnets on the wire?

An electric field of 1.51 kV/m and a perpendicular magnetic field of 0.413 T act on a moving electron to produce no net force. What is the electron's speed?

If two bar magnets are put together, south-to-south and north-to-north, is the resultant pole strength of the combination equal to the sum of their pole strength?

Give an equation for the force F experienced by an electron travelling in vacuum at right- angles to a magnetic field B, and state its direction. Explain each term in the equation

A magnet can exert a force on a moving charged particle, but it cannot change the particle’s kinetic energy. Why not?

A proton is moving to the right above a horizontal wire that carries a current to the right. What is the direction of the magnetic force on the proton?

What is the largest force that the Earth’s magnetic field (here in Vancouver) could exert on an electron moving at a walking speed? Explain what direction the electron would have to move in to get the largest possible force.