13. Different shapes of conductors are placed in magnetic fields as in the figure. All the conductors carry currents of 2.0 A in the directions indicated while the magnetic fields are 0.50 T. Determine the magnitude and directions ofthe total magnetic force on the conductors. {a} Rectangular 1 {b} Half circle {10 cm radius} {c} Rectangular 2 (d) Irregular loop . . . . . x g x x x . - - - - x x x x x x x x X x x x x . x x x x x x x x 14. An electron (charge = 1.6 X 10-19 C} is entering to a 0.600 T magnetic field {into the sheet} with a velocity of 6.0 x 106 m/s as shown in the figure. (a) draw the Path of the electron inside and out the magnetic {b} calculate the radius ofthe electrons path inside the magnetic field. The mass of an electron is 9.1 x 10-31 kg. (c) Repeat above two parts for a proton {charge is 1.6 x 10-1" and mass is 1.67 X 1027 kg}. {d} Explain the differences between the paths of the proton and electron inside the magnetic field. lc XXXXXXXXX XXXXXXXXX XXXXXXXXX XXXXXXXXX XXXXXXXXX 8. The magnetic field due to current in wires in your home can affect a compass. Discuss the effect in terms of currents, including if they are ac or dc. 9. In figure, charged particle moves in the vicinity of a current carrying wire. For each charge particle, the arrow indicates the initial direction of motion of the particle, and the + or - indicates the sign of the charge. For each of the particles, indicated the direction of the magnetic force due to the magnetic field produced by the wire. Explain how you get the direction. d+ 10. Three particles, a, b, and center a magnetic field and follow paths as shown in the figure. What can you say about the charge on each particle? Explain. 8 a, b, c 8 11. Find the direction of the force on the current caring wire in magnetic fields shown below. Indicate each answer with a clear direction. Eg. You can say "into the paper" or "out of the paper" B 12. Find the direction of the magnetic force on a negative charge for each diagram shown in the figure, where v is the velocity of the charge and B is the direction the magnetic field. ( b ) (c ) ( d) o FIGURE 20-52 Problem 12. (e) (f) 2 | Pag e