51fly国际课程 (51fly.win)

 找回密码
 立即注册

手机扫一扫,访问本页面

 

      

上传图片附件

未使用图片

小贴士: 允许的图片文件格式为: gif, jpg, jpeg, png, webp,上传完成后会在上方生成预览,用鼠标连续双击缩略图,或拖动缩略图,该图片就被绑定至本题,显示在题目下方

本次作答已使用

小贴士: 此栏目显示的是当前作答使用的所有图片,绑定到某一题目的图片同时会显示在该题目下方; 删除使用的图片会将其转移到<未使用图片>类别


习题练习:Physics Unit22: Electromagnetic Waves



 作者: physics   总分: 35分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月28日 10:07  切换到: 整卷模式

标记此题
1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The basic equations for all electromagnetism were dd*ho493exuct eveloped by

参考答案:    

标记此题
2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electric field is produr92cjfxt8zcp4il1rzmy ,s8 7bs7y1 iced by a

参考答案:    

标记此题
3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A changing electric field will prod,,brvytxfj0 //ase,uvsu ;s1uce a

参考答案:    

标记此题
4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic waves travel the kal2e9s1edu *8 r*elrough a vacuum at

参考答案:    

标记此题
5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a vacuum, the velocity of all electromagnetic wavesb.xapj0 jlx vt1p/53g

参考答案:    

标记此题
6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves cadq,c8evlw5 z 4n travel through

参考答案:    

标记此题
7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The strength of both the electric and ma nahjbb 8ek1 r0dsk6jcwq.-8+o6wq4 dgnetic fields in the radiation field are found to w0jqkbq1o-adc8 +n h wkb.de 8s64 6jrdecrease with distance as

参考答案:    

标记此题
8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The $E$ and $B$ fields in electromagnetic waves are oriented

参考答案:    

标记此题
9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electromagnetic wave is travelings4(ix31rnygnl jktz 9r -qkh4* xlt 7q o98gi. to the east. At one instant at a given point ixty8 s- xn* n lj7q3lg(qg949oztk.r1 4khriits $E$ vector points straight up. What is the direction of its $B$ vector?

参考答案:    

标记此题
10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electromagnetic wav vs ev hrg:b2k8+vaw1 3 7ii0mtmldor -2pz(0oe is radiated by a straight wire antenna that is oriented vertic28:hw0m70it +3 v r( ilzsag-2orb1md kvovepally. What should be the orientation of a straight wire receiving antenna? It should be placed

参考答案:    

标记此题
11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waveszq:gm 7q(k7sa *n gf2.02f*fy kxnsz s are

参考答案:    

标记此题
12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, which is not electromagnetic in natu zl5vpht -l9o8re?

参考答案:    

标记此题
13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Visible light ranges s1kppxn 2( ej9zu6 4hfeq ec8;in wavelength from

参考答案:    

标记此题
14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy an electromagnetic,oueu-u nj* ud .3oa i),eulkq86q4lb wave transports per unit time per unit area is thee 8dq eolu.3u)n4lb,u6-uijuqo a, k*

参考答案:    

标记此题
15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The force per unit area exerted by an electromagnetic wave is s9hc3q di rz0rp4l4s+ called the

参考答案:    

标记此题
16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following correctly lists electromagnetic waves inbc.x s2 0vmz(cn3jj :t order from longest to shortest wavelength? vn3z b0stjc:(jmcx 2.

参考答案:    

标记此题
17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric field in an EM wave has a peak value of 2.0 V/m, what is the pea6rixg 68-n ob)akcy it8rub1.k value of the magnetic fi).ryu6xtaki8ob c-g1nr 6b i8eld?

参考答案:    

标记此题
18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength of light waclj1z czx.yi 2ll)/l 2ves if their frequency is $5.0 \times 10^{14} \; Hz$?

参考答案:    

标记此题
19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the waveleng212c o),.:ipel prpm.4 aqnawdtfvz) th of a 92.9-MHz radio wave?

参考答案:    

标记此题
20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength of a radio wave signal transmitted dkq2bsh; 3n(x a1(v8-g lz defat a frequency of 7.2 v e( ;qx(1zfkadnb823 -hsg dlMHz?

参考答案:    

标记此题
21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength for the carrier wave in oik/:q;, lzzv the station WBRN 1460?

参考答案:    

标记此题
22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the frequency j tr,kxo8i,83x iwx4 *q/nexeof 20 mm microwaves?

参考答案:    

标记此题
23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How far does light tts , ch ;n.q2onud) on)wfm3n/ravel in 1.0 ms?

参考答案:    

标记此题
24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How long does it take light to travel hn6p-eqgua0un8 en09 1.0 m?

参考答案:    

标记此题
25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How long does it take the signal from a local 9c7bvam6ug-h radio station to travel 20 miles?

参考答案:    

标记此题
26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How far is a light year (the distance light travels i -es )c0x3gx2 y4sy/-lgty dynn a year)?

参考答案:    

标记此题
27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A radar receiver indicates that a transmitted pulse return as an echo inc 1jp :t.usf;m)rue)tj bu-9y 20 ms after transmission. How far away is the reflecti;) y9mfjs pu )t.b:rcu- jtue1ng object?

参考答案:    

标记此题
28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Radiation from the Sun reaches the Earth (above th0sc2n .tq.z rie atmosphere) at a rate of abors 2z0c..i ntqut $1350 \; W/m^{2}$. Assume that this is a single EM wave and calculate the maximum value of the electric field.

参考答案:    

标记此题
29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Radiation from the Sun reaches the Earg5 .(vj5hi -kidf/ 1v.ggns pjth (above the atmosphere) at a rate of aboutj(j5ifpi-1sg g v.5/k.ngd vh $1350 \; W/m^{2}$. Assume that this is a single EM wave and calculate the maximum value of the magnetic field.

参考答案:    

标记此题
30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the maximum value of the exqu nl ;qs d+nu2g3(k*lectric field at a distance 2.5 m from a 100-W lighu nn+ls(*d kx;3 gq2qut bulb?

参考答案:    

标记此题
31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the maximum value of theotw/j4 m +7mxy w/wzs 1xj5wo3 magnetic field at a distance 2.5 m from a 100-W light x/z +jw 1 ywm5o/xwmos437wjtbulb?

参考答案:    

标记此题
32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15.0-mW laser puts out e / l8-qwmt)r -80ej4eptbjbra narrow beam 2.00 mm in diameter. What is the average (rms) value of88e) qp/jbtm-r0lj erb-e4 tw the electric field?

参考答案:    

标记此题
33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15.0-mW laser puts out a narrow beam 2.00 mm in diameter. What is the o7d(sh+ 6kgwt, v6thtaverage (rmdwo+7s h h(kv6,ttgt6 s) value of the magnetic field?

参考答案:    

标记此题
34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is transported acr7ag 8q-tez dyh j4:fq9oss a $1.00 \; cm^{2}$ area per hour by an EM wave whose electric field has an rms strength of 21.5 V/m?

参考答案:    

标记此题
35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Estimate the average power outx gd7dzymy qrk 3751g/bc2x o,put of the Sun, given that about $1350 \; W/m^{2}$ reaches the upper atmosphere of the Earth. The distance from the Sun to the Earth is $1.5 \times 10^{11} \; m$.

参考答案:    

  • :
  • 总分:35分 及格:21分 时间:不限时
    未答题: 已答题:0 答错题:
    当前第 题,此次习题练习共有 35 道题

    浏览记录|使用帮助|手机版|51fly国际课程 (https://51fly.win)

    GMT+8, 2025-5-8 08:37 , Processed in 0.232645 second(s), 114 queries , Redis On.