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: 游客未登录  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 f-t*c 64te7n hn.oxmzmor all electromagnetism were developed 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 iso9km2 tbu4 mduc o*;zt8w(w9r produced 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 fie21or jxb d23meld will produce 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 1i1buy ac3; bkouep*p5 p. j;ktravel through 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 velm:p4,elro yq)4j rg*pocity of all electromagnetic waves

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 can travel through.)rek(hkxl/ x8ic)z ihj55kf

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 electke ,+ 6oxg4njmric and magnetic fields in the radiation field are foum6x, ejg+kon4 nd to decrease 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 traveling to the east. At one inst 7czbt7e2wpc54v + jpgant at a given point its 2 gw 7ebcv+5p 4jp7tcz$E$ 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 waveipt mpyuf j*1e-3i7mb,a1 ; f9ybsf4r is radiated by a straight wire antenna that is oriented vertically. What 4 b jife f1y9i7pm-rp31btamfu; *ys,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 waves are escz3i.(oyb8nv 4 -ke

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 isp hr x7h nfwm+nu*w/4+ not electromagnetic in nature?

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 in wavelengt.y;nu ful0 zkn 34)qpeh 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 electrohxc y0:lx 9lwpjx9)u(magnetic wave transports per unit time per unit area is thexx(wx) cljl:hy90 p 9u

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 o5/,w josuaq3 1x+yvqby an electromagnetic wave is 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 correctlyk: qhk) uy9m0aehm2;) ym)znv lists electromagnetic waves in order from longev );mq:)m0 ay9 mnykkhuehz2) st to shortest wavelength?

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, whad20voha, l*bhn .bh -ib+v1wp t is the peak value v0v b 2 ipbbnl,.odha+h-1*whof the magnetic field?

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 wvw,5yay++m3z7e5 d mqfwzvdau;t j ,,aves 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 wavelength of a 92.9-MHz ru (lpsg0 vy41f68vlbf adio 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 signbny-2 6-vit4xu e5am 2-jyvzgal transmitted at a frequency of 7.2 MHzjuy2mz v2y-56 xtg -nvei4-ab?

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 carransh0qm.ee9( f6 q(ixcap1 3 hier wave in 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 of 20 mmwb ;,z4c4 9w /ivbnouqi(tad- 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 travel i7p 2x2u vy/lw3u,zsrqn 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 8uqhp(poe.)s r l8 p6y1.0 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 t/ t;iognsbo46he signal from a local 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 distan7ij4ugq*e *r tce light travels in 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 thw73 : dexoppb79aj+8i6 jvmmm at a transmitted pulse return as an echo in 20 ms afb:epv 8 6wid 77mojm9m 3+japxter transmission. How far away is the reflecting 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 the atmosphere) at a r 58x*7zttebe+6gc s vrate of abous+erz5b *c 67 gtxetv8t $1350 \; W/m^{2}$. 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 Earth (above the atmkmge q *:e(o9gosphere) at a rate of abouqge 9(mgo:ke* t $1350 \; W/m^{2}$. 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 valcduq0nbwbz f q1 33mvq2 7*)hrue of the electric field at a distance 2.5 m from a 100-W lightwqhczq2*rn)ufb3 q03v 1 m7db 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 theekhkxg (*. 8uz magnetic field at a distance 2.5 m from a 100-W light bul 8 h.uegzkkx*(b?

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 a narrow beam 2.00 mm in di099shf)h4wsmn eg, 6rb c5vo1jy hl.exj)um1ameter. What is the average (rms) value of the ele9 9,.mewe f)0v s5 n ) ucrhylhj611gxbojs4hmctric 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 beab stp:m+6,p pn9c6veb m 2.00 mm in diameter. What is the average (rms) value oteb,ppn+bs6p96vm c:f 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 3fh:*s-ipsgqe , p l40q1xjt eacross 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 output of thf0vou ayan. w 4kkk4+9e 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
本平台(https://autoconfig.51fly.win/)支持练习,作业与考试(自动评分)三种模式,群组成绩统计排序导出,题目动态变量实现同卷千人千题
如果您对本系统感兴趣,想加入我们或者想进行任何形式的合作,请加微信 skysky1258

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

GMT+8, 2026-8-16 23:57 , Processed in 8.084278 second(s), 99 queries , Redis On.