Shaoxing city model photography

(1) The velocity of the metal frame relative to the magnetic field is v0-v,

The electromotive force generated on each side: E=BL(v0-v),

From ohm's law: I=E, total R 1,

Solution: I=2BL(v0? v)R 1？ ①;

(2) When the acceleration is zero, the train speed is the maximum.

At this time, the ampere force on the two long sides of the train is FB=BIL ②,

From the equilibrium condition: 2FB-Ff=0? ③ it is known that Ff=kv2,

Solution: VM = 2bl2l2+kr 1v0? 2 b2l 2k r 1；

(3) When the electromagnet passes through the left boundary of the zigzag coil, the circuit is as shown in figure 1:

Induced electromotive force: e = n △φ△ t, △φ = b ′ lb,

Current: I 1=ER2,

Charge amount: Q 1=I 1△t,

The solution is q 1 = nb'lbr 2,

When the electromagnet passes through the middle of the zigzag coil, the circuit situation is shown in Figure 2:

△φ= B′Lb，2E = 2n△φ△t = i2r 2，Q2=I2△t，

Solution: Q2 = 2nb'lbr 2,

When the electromagnet passes through the right boundary of the zigzag coil, the circuit situation is shown in Figure 3:

QQ=I3△t, the solution is: Q3 = Nb'lbr 2,

Total charge Q=Q 1+Q2+Q3,

The solution is: q = 4Nb' lbr2;

Answer: (1) The magnetic induction current generated in the metal frame MNQP is 2BL(v0? v)r 1；

(2) Find the maximum speed that the train can reach, vm=2BL. What's your comment on this answer? Comments put away the recommended lawyer service: If your problem is not solved, please describe your problem in detail and provide free professional consultation through Baidu Legal Pro. Other similar problems such as 20 16-04- 19 can be simplified to the model as shown in the figure. On the horizontal plane, the uniform 420 16-08-08 superconducting maglev train with two parallel straight rails equidistantly distributed in the vertical direction levitates the car body by using the diamagnetism of superconductors, and its propulsion principle can be simplified as the model shown in the figure: on the horizontal plane, the 22016-/kloc-0-07 phase maglev train is a new type of high-speed and low-consumption. Its driving system is simplified as the following model. The power winding fixed at the lower end of the train can be regarded as 20 16-04- 10 maglev train is a new type of high-speed and low-consumption vehicle, and its driving system is simplified as the following model. The power winding fixed at the lower end of the train can be regarded as 120 16-03-24 eddy current braking, which is a way of high-speed braking of maglev train. It is a way of high-speed braking of maglev train. Make the car and track model as shown in the figure to quantitatively simulate the magnetic eddy current braking of12016-10-21. A research institute used vehicle and track models to quantitatively simulate the maglev train. The maglev train 2016-04-11is a new type of high-speed and low-consumption vehicle. Its driving system is simplified as the following model. The power winding fixed at the lower end of the train can be regarded as a maglev train 20 16-07- 15, which is a high-speed and low-consumption vehicle. Its drive system is simplified as the following model, and the power winding fixed at the lower end of the train can be regarded as 1 for your recommendation: F. Context ('CMS Right', [{'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 ':' '，}])； 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? Is Huaqiang North's second-hand mobile phone reliable? Baidu legal pro-free legal service recommends super 3w professional lawyers, 24-hour online service, with an average of 3 minutes to reply to free appointments. Online lawyers guide professional lawyers to complete one-on-one communication at any time, waiting for your answer? Change and help more people? Download Baidu Know APP and grab a fresh experience. Know the APP with Baidu and grab a fresh experience immediately. There may be answers that others want to know in the camera of your mobile phone. Scan QR code to download illegal and harmful information about personal and corporate infringement complaints. Please select and submit a category below.

Pornography, vulgarity, suspected crimes, false political information, junk advertisements, and low-quality irrigation. We will inform you of the report results as soon as possible through news and e-mail.

explain

0/200

Submit to cancel the collection of my wealth value.

Exchange goods-

Log in to my cash.

Withdraw cash to download Baidu know APP

Withdraw cash in the application task center

I see.

-

Log in to do the task, open the treasure chest, and finish it cumulatively.

0 tasks

10 task

slightly ...

50 tasks

slightly ...

100 task

slightly ...

200 task

slightly ...

The task list is being loaded ... novices help me answer questions, be adopted, introduce the game with wealth values, and know that the mall helps group partners to verify that your account status is normal.

Thanks for your support.

Complaints, suggestions, opinions, feedback, account complaints, illegal information reporting, Beijing ICP certificate 030 173-1? Text 2023 1034-029? Must read before using Baidu in 2024? Know the agreement |? Enterprise promotion

Suksuke

way

var _ HMT = _ HMT | |[]； (function(){ var hm = document . createelement(" script ")； hm.src = "/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 = 17 190 16954；