10. [-/2 Points] DETAILS SERPSEWA 10 28.WA.015. MY NOTES A velocity selector in a mass spectrometer, like the one shown below, uses a 0.130 T magnetic field. O O Ion O source O' Of O O O O O O O 2r 2r2 O O O O B (a) What electric field strength is needed to select a speed of 4.71 x 10 m/s? V/m (b) What is the voltage between the plates if they are separated by 1.00 cm? KV12. [-/4 Points] DETAILS SERPSEWA10 28.WA.024. MY NOTES Two insulated current-carrying wires (wire 1 and wire 2) are bound together with wire ties to form a two-wire unit. The wires are 2.73 m long and are stretched out horizontally parallel to each other. Wire 1 carries a current of I1 = 8.00 A and the other wire carries a current I2 in the opposite direction. The two-wire unit is placed in a uniform magnetic field of magnitude 0.400 T such that the angle between the direction of Ij and the magnetic field is 75.0. While we don't know the current in wire 2, we do know that it is smaller than the current in wire 1. If the magnitude of the net force experienced by the two-wire unit is 3.50 N, determine the current in wire 2. A 13. [-/5 Points] DETAILS OSUNIPHYS1 28.4.WA.014.TUTORIAL. MY NOTES A wire shaped as shown in the figure carries a current I = 0.550 A in a uniform magnetic field B = (-7.60 T)k. If the radius of the semicircular arc is R = 0.320 m, determine the force acting on the current-carrying wire due to the external magnetic field B. (Express your answer in vector form.) N BX JX X X L X Top view15. [-/1 Points] DETAILS HRW9 28.P.068. MY NOTES A wire lying along a y axis from y = 0 to y = 0.300 m carries a current of 1.60 mA in the negative direction of the axis. The wire fully lies in a nonuniform magnetic field given by B = (0.300 T/m)yi +(0.400 T/m)yj. In unit-vector notation, what is the magnetic force on the wire? H Math Help Cross product - Magnitude & Angle 16. [-/4 Points] DETAILS HRW9 28.P.017. MY NOTES An alpha particle (q = +2e, m = 4.00 u) travels in a circular path of radius 5.50 cm in a magnetic field with B = 1.00 T. Calculate the following values. (a) the speed of the particle m/s (b) its period of revolution (c) its kinetic energy ev (d) the potential difference through which it would have to be accelerated to achieve this energy