A bar magnet is dropped toward a conducting ring lying on the floor. As the magnet falls toward the ring, does it move as a freely falling object? Explain.

A bar of mass ?m rests perpendicularly on a pair of rails separated by a distance ?L that lie in the ??-xy-plane, as shown. The bar is initially at the left edge of the rails at position ?=0.x=0. An external force moves the bar in the +?-+x-direction at a constant speed ?.v. The apparatus lies in a region of magnetic field ?⃗ B→ that is parallel to the ??-xz-plane and points at an angle ?θ above the −?-−x-axis. The magnitude ?B of the magnetic field decreases in the ?-x-direction according to the equation ?=?/(?+?),B=c/(a+x), where ?c and ?a are positive constants. Derive an expression for the magnetic flux ΦB(?)ΦB(t) as a function of time ?t through the loop formed by the bar and rails. Define the normal to the loop to be in the +?-+z-direction, and express your answer in terms of the given quantities.

What would be the magnitude and direction of force FB on an electron (q = -e, me = 9.1 x 10-31 kg) shot in the +y direction with a speed of 4.7 x 106 m/s in a uniform magnetic field B = 2.6 x 10-4 T along +y direction ? FB = 2.4 x 10-16 N away from us, towards the plane of the screen FB = 0.00 N so will maintain its velocity. FB = 1.95 x 10-16 N toward us, away from the plane of the screen FB = 4.9 x 10-11 N away from us, towards the plane of the screen

A proton moves perpendicular to a uniform magnetic field B at a speed of 1.90 x 10’ m/s and experiences an acceleration of 1.60 × 1013 m/s in the positive x direction when its velocity is in the positive z direction. Determine the magnitude and direction of the field. magnitude direction |---Select--- ♥V