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习题练习:Physics Unit22: Electromagnetic Waves



 作者: admin   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

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The basic equations for all electromagmc 33)bxu i3nnnetism were developed by

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electric field is produced bxbjbz4;)ukgr 6/n d lw 7s9uzrlcf-3lzg99 4 yy a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A changing electric field +aq321nvz0knm o 8hgg9i cfe)will produce a

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic waves tra6ip scl+ bg6s(vel through a vacuum at

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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 wav.r(jaaa7, ) rvwerx grfa 6/d1es

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves s :,jc3d08:gme k7 wb;rlf bmlcan travel through

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The strength of both the electric and magnetic fields in the radiation field iw8al rch, bc2l8u8)o are fowo,r 8 2ccb8u8ia)lhl und to decrease with distance as

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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

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electromagnetic wave is traveling to th/+nggmu ex8t r7klm25jfl0 /g e east. At one instant at a given point itsr8mf kg/l72gexm5 n/g0+u jlt $E$ vector points straight up. What is the direction of its $B$ vector?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An electromagnetic wave is radiated 8 xl5i mumie/c o4u;6rby a straight wire antenna that is oriented vertically. What should be rmui;85 om cu/ix6 el4the orientation of a straight wire receiving antenna? It should be placed

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves arechqwp51w4+sab l+b1e;i l1 sl+go.z j

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, which is not electrk1)u1j 2.msb gj-r 5jf*lif tvomagnetic in nature?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Visible light ranges s:n d kz1k( n6zhkr6zjz+, *8jzdq- msin wavelength from

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy an electromagnetic wave trans 8l0i ig- 6bv:p1rdoxlports per unit time per unit area is theo18rx0:lg lp6i-v ib d

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The force per unit areiix ce/g82f6efb+q-d a exerted by an electromagnetic wave is called the

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the followinglfu gan yb3mzb .-potk-- m,+) correctly lists electromagnetic waves in order from longet ,-)3ng-o bmpkul afz.y b+-mst to shortest wavelength?

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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, whqzn ;x n rv(ks9 e/d3lxech+8 .y(5panat is the peak ve axn(8yq /c;.k9h+(z5pn3 edsxl rnvalue of the magnetic field?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the wavelength of light waves if theirl*c g(do3 yltcjjqat14j:/v8 frequency is $5.0 \times 10^{14} \; Hz$?

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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-My6f.qpfnctoh g7 6.3iHz radio wave?

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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 at a frequen-or,tctatn5 q (i vs,6,b. nmbcy of 7.2 M(rc6 ,.svmtqn,nb o at-ti,b5Hz?

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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 the sta:zqbu s:odo )-tion WBRN 1460?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the frequency of 20 m c12qjpi0n v,pm microwaves?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How far does light travel in 1.0 ms?epmp ,z1p)1gy+5xve z pw;(zp

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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 1.0 dzbbl)7 /ac0hybscv+(5 r 0hym?

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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 radio station to travcro0znx,xk/ ji . .( 4e,hgmlael 20 miles?

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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 in a yej0 8q2;z:lg*idt k xll, kki)nar)?

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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A radar receiver indicaj)snf-o*t:l 6j (vepotes that a transmitted pulse return as an echo in 20 ms after transmission. How far away is the reflecting objec*jo ( jlvoten -)fsp:6t?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Radiation from the Sun aqgecf.dqmja uz 2+y3;z; 4v 9i mzmz+bfz /,+reaches the Earth (above the atmosphere) at a rate of about +94 qzd; izb2f mj.z;+za3+,mcy z/ qgfa emuv$1350 \; W/m^{2}$. Assume that this is a single EM wave and calculate the maximum value of the electric field.

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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 atmosphere) at a oxg6v+o9 r+ 6m gsi3xsrate of abougs3x+oi rmv6g9xs6+ ot $1350 \; W/m^{2}$. Assume that this is a single EM wave and calculate the maximum value of the magnetic field.

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the maximum value o f*ouibrp;; ie* :gaz4f the electric field at a distance 2.5 m from a 100-W light af zpi;4br gui*e*; :obulb?

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the maximum value of the magnetic field at)wb3 *pjalfio-s+ k 7+mim4ee a distance 2.5 m from a 100-W ei kf 3mp)+o-+ bilam *j7esw4light bulb?

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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 nab760wk* byy o5mdo/- mg: ehj1xom ;mwrrow beam 2.00 mm in diameter. What is the average (rms jb- my/;oo1ww me 6yx*hombk 5m0:7gd) value of the electric field?

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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 xtn1ji;,r- x yvf0m,p beam 2.00 mm in diameter. What is the average n,ifxt1-x;y0mr,p vj (rms) value of the magnetic field?

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is tq5c e:au5::de nt *cto8x k8fzransported across a $1.00 \; cm^{2}$ area per hour by an EM wave whose electric field has an rms strength of 21.5 V/m?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Estimate the average power output t9t;9zw tf0e )-x1;s 5ivuti qg:lq 3ab)lup tof 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 $1.5 \times 10^{11} \; m$.

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