According to the kinetic energy theorem, qu = 12mv20.
The solution is v0 = 2 qum.
Particles enter the magnetic field vertically and make uniform circular motion with radius r,
Then qv0B0=mv20r.
R = mv0qb0 = 2muqb20。
(2) Let the period of particle motion in the magnetic field be t,
T = 2π rv0 = 2π mqb0 = t0。
Therefore, when the magnetic field is injected from point O at t=0, at time T0, the particles first make a counterclockwise uniform circular motion at time T4.
Then it takes T2 time to make a uniform circular motion clockwise, and T4 time to make a uniform circular motion counterclockwise to reach point P on the X axis, as shown in the figure.
Then op = 4r = 42muqb20.
The position coordinate of point P is (42mUqB20).
(3) Because t0 = 5 π m3qb0 = 56t, from T04 to 34T0 at T02,
Then t02 = 5 12t = 150 360 T.
That is, the particle moves through the angle of150 in the half period of magnetic field change, and the trajectory of the particle reaching point Q after T0 is as shown in the figure, which is defined by the geometric relationship α = 60, o 1a = .o 1o2sinα.
The abscissa of point q xq = r = 2muqb0.
The ordinate v0 = .oo 1+.o 1a+. ooo = (2+3) r = (2+3) 2muqb20。
That is to say, the position coordinates of point Q are (2mUqB20, (2+3)2mU, which is praised and trampled. What's your comment on this answer? Put away comments//high quality or satisfaction or special types or recommended answers dottimewindow.iperformance & window.iperformance.mark ('c _ best',+newdate); Lawyer recommendation service: If your problem has not been solved, please describe your problem in detail and consult other similar problems for free through Baidu Legal Professional Edition. As shown in the figure, there is a uniform magnetic field with constant magnetic induction intensity above the X axis of the plane rectangular coordinate system, and there is a 2016-10-29 (2065438) parallel to the xO y plane below the X axis. Zibo mode 2) In the rectangular coordinate system, there are uniform magnetic fields and uniform electric fields perpendicular to each other on the right side of the Y axis, with the magnetic field direction perpendicular to the paper surface and the electric field direction of 22014-1-30 as shown in Figure A. In the xOy coordinate system, there is a uniform electric field along the positive direction of the X axis on the left side. The field strength is E3820 13-06- 10. The particle on the Y axis is simply harmonic with the coordinate origin as the center. The vibration diagram is shown in Figure A, 92016-12-01. In the coordinate system xoy, there is a uniform electric field along the X axis on the left side of the Y axis. On the right side of the Y-axis, there is a uniform magnetic field with a magnetic induction of B, a right-angled fan-shaped metal frame with a radius of R, and an electrostatic field along the X-axis in the total space of 32016-12-01. The electric field intensity e varies with x, and a and b are about 320 16-08-30 on the x axis. As shown in Figure A, there is a uniform electric field along the Y axis in the area of rectangular coordinate system 0≤x≤L, and the relationship between the intensity and direction of the electric field and time is shown in Figure 4. [{ ' URL ':'/d 0 1373 f 082025 AAF 5 1 1aa 256 e 9 edab 64034 f 1a 07？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId':'A24KA00562 '，}，{ ' URL ':/s？ word = % E6 % AC % A7 % E6 % B4 % B2 % E6 % 9D % AF & sa = searchpromo _ ozb _ zhidao _ tuijian '，' src ':'/3 BF 33 a 87 e 950352 AAF 5 df 4954 143 fbf2b 2 1 18 b6b？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}])； Is Huaqiang North's second-hand mobile phone reliable? Why is the cost of cancer treatment getting higher and higher? What impact will the "network toilet" have? The price of electric cars has dropped many times. Is the quality guaranteed? I recommend f.context ('recbrand', [{"img": "\/86D6277F9E2F07083523F69DFB 24B 899A901F20d? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "，" url":"/hm.js？ 6859 ce 5a af 00 FB 00387 e 6434 E4 FCC 925 "； var s = document . getelementsbytagname(" script ")[0]； s.parentNode.insertBefore(hm，s)； })(); window . TT = 1720 126649；