A wire having a linear mass density of 1.00 g/cm is placed on a horizontal surface that has a coefficient of kinetic friction of 0.200. The wire carries a current of 1.50 A toward the east and slides horizontally to the north at constant velocity. What are (a) the magnitude and (b) the direction of the smallest magnetic field that enables the wire to move in this fashion?

An electron traveling due North with speed 4 x 10° m/s enters a region where the earth's magnetic field has the magnitude 5 x 10-5 T and is directed downward at 45° below horizontal. What magnitude force acts on the electron?

An alpha particle has a positive charge that is double the charge of a proton, and a mass of 6.64 ✕ 10−27 kg. At a particular instant, it is moving with a speed of 5.00 ✕ 106 m/s through a magnetic field. At this instant, its velocity makes an angle of 62° with the direction of the magnetic field at the particle's location. The magnitude of the field is 0.230 T. (a) What is the magnitude of the magnetic force (in N) on the particle?   (b) What is the magnitude of the particle's acceleration (in m/s2) at this instant?

The magnetic field near the surface of a neutron star has a magnitude of 1.00  108 T. Find the acceleration of an electron near the star moving at 1.08  107 m/s if both v and B are in the same plane, with B directed to the right and v directed 32.3° above B.magnitude of the acceleration =

An a-particle has a charge of +2e and a mass of 6.64 x 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.46 x 106 V and then enters a uniform magnetic field whose magnitude is 1.99 T. The a-particle moves perpendicular to the magnetic field at all times. What is (a) the speed of the a-particle, (b) the magnitude of the magnetic force on it, and (c) the radius of its circular path? (a) Number i (b) Number i (c) Number Parallel plate capacitor VA VB Units Units Units VB x r V x x x B (into screen)

A proton moves perpendicularly to a uniform magnetic field at 3.0 ✕ 107 m/s and exhibits an acceleration of 1.0 ✕ 1013 m/s2 in the +x-direction when its velocity is in the +z-direction. Determine the magnitude and direction of the field.

An electron is moving horizontally at 3.0 x10^4 m/s enters a uniform magnetic field of 0.055 T directed upward at 30 degrees with the horizontal. Find the magnitude of the magnetic force acting on the electron.

A 1000 kg automobile drive west along the equator near Lake George in Uganda. At this location the earth’s magnetic field is 3.5 x 10 ^-5 T and points north parallel to the earth’s surface. If the automobile carries a charge of -20 x 10^-6 charge, how fast must it move  so that the magnetic force balances 0.010 percent of its weight?

A proton is initially moving west at a speed of 1.07  106 m/s in a uniform magnetic field of magnitude 0.282 T directed vertically upward. Describe in detail the proton's trajectory, including its shape and orientation. Find the magnitude

A = 60 B = 70 C = 170 D = 7