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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 electromagnetism were d7drggc, i (c6p/ g-yqu-scq7f/pr4tb eveloped 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 isi ibon;pq76 a55 fi+*vz, ddvf produced 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 pf:pqo/j3a 8q6cz94vjp5 h v ifroduce 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 travel througc/k1xl mk.vh; l7:kcuh 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 wallcf 3ys6 opm2:jm* ;wves

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electromagnetic waves can travel throug ;1 j2t qgd-jhjtj-/fk 7qreg;h

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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 fielf 6,l. rrjdy7fl6m/ukds in the radiation field are found to decrease with d 6m/dly6,fj7ur . rlkfistance 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 inyjysm;h74ip* stant at a given pointmiy7; h4 *jsyp 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 thatt,jnr ,/cei wt xu2; o5p,rjdjj)7v;j is oriented vertically. What should be the orientation of a straight wire receiving antenna? Ipw)j7tjrd rvj 5;j2,,t ui,ceo; x/j nt 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 ar s5z9e( awb)vve

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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 electromaa:stvl nqo0 v(-+xe:ignetic 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 p+/zqa3f9bc mttl v3-in 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 transports per unit time /x4a4v/ mrmbnbw;aj c8 kjj1jf/9fc3per unit area is thea fj c/xb/b/wk8mj1 jm;afj4 cn934 vr

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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 elect2wn, 9xj gs3moromagnetic 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 electroma94 b az9 +u-ys:jh)jzscwlv6 fgnetic waves in order from longest to shortest wavelength:6s -hj9 c4fzljzvuw+9absy)?

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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 haspg ft6yu n:/ttvt9.9ezk 8 ,hf a peak value of 2.0 V/m, what is the peak value of the magnf8y vnt9t,/u: 6kg 9pftt.zheetic 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 o*vwe., hlrd .wf light waves 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 of9cryvza2h( 2g a 92.9-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 wavelength6 wb rg (-tb0edd-grl+ of a radio wave signal transmitted at a frequency of 7.2 MHz?lb 6w-dg g e-+td(r0rb

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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 statioyf0;nf1 czd zhty 130i,ary*on 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 microwkn+:f* wu f:6c:luc2qzv)axg aves?

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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 ijs1xwk0 38 gxen 1.0 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 takeu ob p4nrw71 n3,01hdnekvje1 light to travel 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 7r hwmn;h+y o/from a local radio 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 travelski lq 1vqi)fv8g+,o 2z 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 transmi0sc x,u3ghh f/co7r6ztted pulse return as an echo in 20 ms after transmission. How far away is the reflehosg3cx, u7/0 zfc6rhcting 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 thez ifxfa69qxny;/m33daza) pe c69(ms atmosphere) at a rate of abo axx9n d;fm ip za6 c9fe/(y3qsma36)zut $1350 \; W/m^{2}$. 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 1k iot3sv-w*creaches the Earth (above the atmosphere) at a rate of abou3-1v tkwoci*s t $1350 \; W/m^{2}$. 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 electric field at a distance 2.5 m frof 2r5dijidk71 -e95jxviu:pzm a 100-W li95ji1x5kd2- fj zu:divpi7e rght bulb?

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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 ityn5y:3usgy1mcq; af 3gd:+y1gb-h+y (noza distance 2.5 m from a 100-W ligh ;bg3 :tyfy3c 5 umq-g:ydyaog1+in n(hzsy+1t 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 putsrck;)wif;(s 5vu u9ps out a narrow beam 2.00 mm in diameter. What is the average (rms) value o5swpuc9 fi;s)ruk( ;v f 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. What is the vtuyhgico mk)7 5 2f106p yibch.m/u0 average (rms) value of the magnetic field?)h562u1pt b.0m vmu7o/ci yy0fkhgc i

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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 ac aa nd(z13,mu2(yhpxlo ra:p)x0o m1h ross 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 po*mv; j 6vk+hprwer output 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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