9. An electron moves at a speed of 6.2 x 106 m/s perpendicular to a constant magnetic field. The path is a circle of radius 2.2 x 10­3 m.
a. Draw a sketch showing the magnetic field and the electron’s path.
b. What is the magnitude of the field?
c. What is the magnitude of the electron’s acceleration?
10. A proton is moving at a speed of 3.6x105 m/s perpendicular to a constant magnetic field. If the Magnetic Field has a magnitude of 15T,
a. Determine the radius of the path the proton will follow.
b. Determine the acceleration of the proton.
1
11. An electron moves at a speed of 4 x 105 m/s perpendicular to a constant magnetic field of strength 0.016T. a. Determine the radius of the path the electron will follow.
b. Determine the acceleration of the electron.
400A
A 2.50­m segment of wire supplying current to the motor of a submerged submarine carries 1000 A and feels a 4.00­N repulsive force from a parallel wire 5.00 cm away. What is the direction and magnitude of the current in the other wire? 2
0.1m, same
The wire carrying 400 A to the motor of a commuter train feels an attractive force of 4.00×10−3N/m due to a parallel wire carrying 5.00 A to a headlight. (a) How far apart are the wires? (b) Are the currents in the same direction? 3