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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 electromagne2wmc rd +ti3/*wht.t9m6h5 an-r0 sk sl xi/yitism 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 produceq d .:aaa6rme5d by 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 will produce abh.9pf* ce8mjv+c4ka

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  All electromagnetic waves travel through a vb9v+:jfpk)o cacuum 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 waep 4 ka7d-s/la5 ogy5eves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can tr++rs 2n uruwx/avel 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 fieldsn6/ q9 -y 5c)xnftkgns in the radiation field are found to decrease c k/nnfq5t n y-6x)s9gwith 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 the east. At one instant at a givenxv+ sv9x2tx;g point v+;xx2gs9vtx its $E$ 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 by a straight wire antenna that +a5ulm)wj;pz 4 napd07mup3bis oriented vertically. What should be the orientation of a straight wire receiv aua);b0mj dupml74 p z5+npw3ing 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 ,9ru ts6 3as/zn7hwex are

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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 ele, ry7t9l ux:9fqfzn+ actromagnetic 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 in waqd+6 5stl x ebz05g,i/eou7iovelength 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 transports per unit time .mtvr;gy.o fx;(j ; rfxr8t.yper unit area is the8go x.; t(.;rryry; vfft mx.j

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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 area exerted by an electroma)oij) o aga6tt p,*v,wqy87q: ayv8iugnetic 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 following correctly lists electromagnetic waves in orqr) 7ezph83n 4w,agvrder from longest to shortev rq 3z4gw8,pr hna)7est 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 Vq 3zz9rvw mt,(d3f,(xz pdjy3/m, what is the peak value of the magne 3zxtd( y m (wzfpr3d,vj,39qztic 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 wvjv.d3 z)3n ufw+r op/aves if their 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 92fx +9/fadahr8 .9-MHz 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 frequency of 7.2 x(uqf5)im w 6zu f(m6 )wxiqz5MHz?

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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 th n(x);d0z y 6 pgij-ls,x6cshoe station 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 mm mprp-z rl /vyi )1b:alje( *wv-icrowaves?

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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 o;d 0ad0juvm.fka7 h/ ms?

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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 travelj k0yw7m5obz*2 waxvw)q 0w,y 1.0 m?

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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 tdk4e0* 1pq +mpmrn 0fradio station to travel 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 trakqz(r0 + n-ilk/co 2oovels in a year)?

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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A radar receiver indicates that a transmitted vay+v*nl13 o qh(ock6pulse return as an echo in 20 ms afnhl13ov qcy(koa6 + *vter transmission. How far away is the reflecting object?

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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 reaches the Earth (above 3m5t3v1yuq5 wt mto8hthe atmosphere) at a rate of about t55381tumhwovtymq3 $1350 \; W/m^{2}$. 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 rate offwd)gjgk h3 lkxdha 84:2y8 -p about 8yd4hahgk 3:gpw2xd-lkf8) j$1350 \; W/m^{2}$. 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 of the elec smym;6c gtj.7tric field at a distance 2.5 m from a 100-W light bulb?gc;sm7j6tym .

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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 a distance 2.5 m from af:dtqi/q.d rxb b7igrk k5 2;w/s) k3j 100-W ls7k bt; x /j/rkfiqw db.5qgk)2dir3:ight 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 narrow beam 2.00 mm in diameter. What is txt wdp 8:m/l pltmq6a+ 9;skm(he average (rms) valupt:98(mw; pm6 xmka+d/sll tqe 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 beam 2.00 mm in diameter. vxp gfp/zd 71k9r2ndvz)l .z dz 2*iu- What is the average vz.zk/2dl 1 )dpdi z* f2zxgpurn-7v9(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 transported mfro v 14apk(bwfln(+26k*du 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 output45l7h 3 a fntd/wg6affb(son+ 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 $1.5 \times 10^{11} \; m$.

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