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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 developed zb57je/.sz/xok7 e2zkl 8 icvby

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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 proka* np8r8 r7vknzg(y7duced 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 willpc9vruy7w9h3 asa0.2ih ;h j d 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 travel through a vacuumr7q9 tyjp)gkr dk4xo9q h5e:9tj7w /j 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 electromagnesh bp5eh w78:ttic waves

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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 ph9. 28b06j,e quwwhnphe k9lthrough

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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 nsak*o*w-;wi field are found to d *awkwi-*on s;ecrease 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 htjs1gu4qnn3 4z7 b/o traveling to the east. At one instant at a given point ihzu41q7o/t nb4s 3jgnts $E$ 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 stra+d)q l s9zlo3eight wire antenna that is oriented vertically. What should be the orientation of a straight wire receiving antenna? It sh eqlo3 ds9+l)zould 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 are z)q1a4h3ioly

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, whic u/f ,bjkgehv +/7yhi3f rt4+0xad;kxh is not electromagnetic 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 wavelen4nn8r+lym 8gr-/ 65yyh xgjx pgth 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 per unit 8/ yb/kch1yd:qxfg3 sag a)l -area is the 1ax/qa3lc )gbhs: yk/fy-8dg

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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 ljl9u4:fxnx / j:9guoexerted 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 following correctly lists electromagnetic waves in/)m/ -lwh(by7gqu omr order from longestyu /l)m wb(-gmqo/ rh7 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 wjr8m)ya pwvgat/w, +vce /.px3r an:h;g+*zqave has a peak value of 2.0 V/m, what is the peak va p n q*;)hg:p,wgaw v v+/+raj.83/tceryx mazlue 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 +1 l:xmsh byz,dv 03 bu;kf(duwaves 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 92yl)sj (ss1u x;.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 p;b9abt47f- httt:z:yf7fl6hiac(3hv da ,y of 7.2 MHz?-zb3pbv f:l:i6h d4yyatt ;(,aahh7 ct9tff 7

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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 station WBRN 1460a2r 9bofscu9 7tu u91k?

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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 micrayc fftbo(3 :o7l hlc80..jotowaves?

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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 travi/gr *4utb( (q*r1np gy lre(oel in 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 take light t9 7ayoxzz c,m)o 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 signjxx564v dns *fal 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 lig4qtuukwl8nb)p5 ut)* -3s sj rht travels 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 pulse 3 2rn0ykb knu5return as an echo in 20 ms after transmission. r b0kk52 3nynuHow 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 th fow q 3mo4a7oh56bsuivkn+ ,-e Earth (above the atmosphere) at a rate of aboutnqakfiw,-sm 53 6 7ub4h+o ovo $1350 \; W/m^{2}$. 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) a09hm.n kso jcvh9z.l/ t a rate of abo0vlc hk.hn/.osm 9j9 zut $1350 \; W/m^{2}$. 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 ate 0e5:j7onbp 915 -pngiz xato a distance 2.5 m from a 100-W light bulb?ztpn:a b75ipj9 oxo-1ng5 e0e

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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 magnetihekd+q.6he5 l8wop+ pc field at a distance 2.5 m from a 100-W li5.w++qeho ph elp6kd8ght 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 b-qv 3)c+zo ouream 2.00 mm in diameter. What is the average (rms) vo u)3-z+oq rvcalue 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 g-. . ie iqb oma35jsct lqzqq*6w*8-h2.00 mm in diameter. What is the average (rms) value of the magnetic f35qsmzi j*a8tqe-6qblgwq *c.oih -.ield?

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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 traztkm m +7b 1hxc08l(an/7bljpnsported 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 of the Sun, given that aacg.a0:v8ht mqjk5p; bout $1350 \; W/m^{2}$ 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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