4. [-/2 Points] DETAILS OSUNIPHYS1 28.2.P.023. An electron moving at 4.10 X 10 m/s in a 1.40 T magnetic field experiences a magnetic force of 1.40 X 10-10 N. What angle does the velocity of the electron make with the magnetic field? There are two answers between 0 and 180. . (smaller value) . (larger value) 5. [-/6 Points] DETAILS OSUNIPHYS1 28.2.WA.002. What is the direction of the magnetic force on a positive charge that moves as shown in each of the six cases? X X (b) (c) B' B R (d) (e) (a) ---Select-- (b) --Select--- (c) v --Select-- (d) to the left to the right (e) upward (f ) downward into the page Submit Ans out of the page no force6. [-/3 Points] DETAILS OSUNIPHYS1 28.2.WA.003. MY NOTES What is the direction of the velocity of a positive charge that experiences the magnetic force shown in each of the following three cases, assuming it moves perpendicular to B? F (a) (b ) (C) (a) v --Select-- (b) to the left to the right (c) upward downward Submit Ans into the page out of the page 7. [-/5 Points] DETAILS OSUNIPHYS1 28.2.WA.007. MY NOTES Using appropriate technology, you determine that the Earth's magnetic field at your location has a magnitude of 6.00 x 10"S T and is directed north at an angle of 650 below the horizontal. You charge a metallic projectile and fire it north with a speed of 620 m/s and at an angle of 140 above the horizontal. Determine the sign (+ or -) and charge of the projectile, if the magnetic force on the projectile is 3.40 x 10-10 N, directed due west. C 8. [-/2 Points] DETAILS OSUNIPHYS1 28.2.WA.009. MY NOTES A proton moving in the positive x direction with a speed of 8.5 x 10 m/s experiences zero magnetic force. When it moves in the positive y direction it experiences a force of 1.8 x 10" N that points in the positive z direction. Determine the magnitude and direction of the magnetic field. magnitude direction ---Select--- + 9. [-/3 Points] DETAILS SERPSEWA10 28.WA.013. MY NOTES A proton enters a region of constant magnetic field, perpendicular to the field and after being accelerated from rest by an electric field through an electrical potential difference of -470 V. Determine the magnitude of the magnetic field, if the proton travels in a circular path with a radius of 11 cm. mTCaiken that B = byLOST D = 650+ 140 = 790 10 5 620 m /s F = 3. 4 X1010 N. F = AUB Sino 9= F UB sino 9 = 3. 4 x 10- 10 620 x 6 7105 X Sin790 q = 9. 31 X 10-9 ( q = q.31 hC