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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 a*bcf3 w2hwf*bj1 pn0 ull electromagnetism 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 by u*rz)z05 bv8t u:yuxd 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 produc+lco+bx4qu j+ aye. p3e 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 vacuumpbbp.rcpwrj0.)e7iu1g/ bh ) 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 velocit)dza :43v axiiy of all electromagnetic 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 trpz dgv s; :z+1 kfhu,6+knk)uravel 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 xrfe)(1g;qjo electric and magnetic fields in the radiation field are found to decrease with distance as1 r)f;oe(jxg q

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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 8qcwm dkk,m 3sgc .:6athe east. At one instant at a given poi.da 3, 8:mms kw6gqccknt 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 a s2*bxqgd(uz9/ iyla,0ztro /ntenna that is oriented vertical (q2,i*d 9z /a/0blrtozs yugxly. What should be the 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 wavesmf m3th8 an-*0 fxxnjzre7w.4 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 nbqqrf mm/d-e 87r1sso0c(bm2ot 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 wai/ az(-ijtno/ ,bq)-rg h*tjxhas*3qvelength 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 area i,5 + iewezzo:7rf5ue ss the5+r5,ze:7o ui zse ewf

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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 elextd3-hn b*yvmog 00z: ctromagnetic 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 waix+: a aov;w8sves in order from longest to shortest waves:iaavoxw8 +; length?

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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 valuep-oso8w:( 8z zw m3zyf of 2.0 V/m, what is the peak v3f yz8(z8spzow m-:ow alue 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 theirvm4aw+j )xes9 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-MHz rad-8 3pq81z9opcxjy o srio 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 f1s+7n/ iy hhh+z5d,b fq nuf)4abobx 2requency of 7.2 MHz?/5n+fqynhoihb7uszf42a )+bdh x , b1

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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 -/i1bm*v jz*jce( nuyj) 2d ukthe 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 miy *mlicx)/;dt:co an px .i1a3crowaves?

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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 -wv9/rvrl kdy(2 7crkf37b kn 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 takemq *15/ 1 rvvmwc0vtau(mw 1yb 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 from a local radio st towd3pqd/ *unj r39c5ation 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 travelsyuyll j ;l6+r6/vdx/f 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(1r *omwh 1adt a transmitted pulse return as an echo in 20 ms after wd(r1amho t1* 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 the atmospher6,qpre4o.q7fzuv v9ie e 4s/eejz,u* e) at a rate of about qqze/, e.ieu697fj rspuoe, 4*vev z4$1350 \; W/m^{2}$. 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 Sr j+kfkj3eiutk,8;durg8+6 u un reaches the Earth (above the atmosphere) at a rate of abofk t8 juud8i+g e k3+,;ru6jrkut $1350 \; W/m^{2}$. 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 ele 6reoxkj4*f3 ff*u1x(4 wdirnctric field at a distance 2.5 m from a 100-W light r1ekfofrin(4 dfw6 u3* x4x*j 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 magne/2 eq; 8psjkajtic field at a distance 2.5 m from a 100-W lightsq;2j8ak j /pe 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 owl;fi) q:6ma kjt(3r wut a narrow beam 2.00 mm in diameter. What is the average (rms) value of t3(wl wtmak rj6)q; i:fhe 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. j-v hbol/9loch* fp(9 What is the average (rms) value of the magnetib-v/phhoc*ljfo ( l99 c 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 acros1wdnzh) .j 4y rk9*zqis 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 about r1ll cvdt)i ,gd5rh/h(h/r,o $1350 \; W/m^{2}$ 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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