Wave-EM Wave - 无忧得胜-网上国际课程 (5edu.win)

?作业考试练习?美国物理杯赛(Physics Bowl)?Wave-EM Wave

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习题练习：Wave-EM Wave

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作者: admin 发布日期: 2024-07-31 22:50 总分: 14分得分: _____________

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

10.19: Which is the correct rela-z w08f5g8,azius4 gor-zqjd tionship for the speed v of the following three electromagnetf8z8zz g d i0jsr-q4uag5wo,-ic waves in vacuum? The waves are : X-rays, UV rays, microwaves.

A. $V_{x\:ray}\:<V_{microwaves}\:<V_{UVrays}$

B. $V_{microwaves}\:<V_{UVrays}\:<V_{x\:ray}$

C. $V_{x\:ray}\:=V_{microwaves}\:=V_{UVrays}$

D. $V_{UVrays}\:<V_{microwaves}\:<V_{x\:ray}$

E. $V_{x\:ray}\:<V_{UVrays}\:<V_{microwaves}$

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

05.15: In the electromagnetic spectrum, rdpxct v)1*,f+qm:v* (vqast 9zj6t vpank the following electromagnetic waves in terms of increas+ *6*p:1qdv t(t 9vq ,mfjztvscap x)ving wavelength

A. Smallest wavelength light is Ultraviolet-X-ray Largest wavelength light is Radio waves

B. Smallest wavelength light is Ultraviolet-Radio waves Largest wavelength light is X-ray

C. Smallest wavelength light is Radio waves-Ultraviolet Largest wavelength light is X-ray

D. Smallest wavelength light is Radio waves-X-ray Largest wavelength light is Ultraviolet

E. Smallest wavelength light is X-ray-Ultraviolet Largest wavelength light is Radio waves

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.06: Electromagnetic radiation tryzk + ;usoog12)pv**a e9lgetavels through vacuum with a wavelength of 400 nm. Which one of the following choices best describes thg yvgltz9+ep 2e*)1 sooua*k ;is type of radiation?

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.11: Which of the folk4f3eo j-qop wii/ksp0k:9j2lowing types of electromagnetic radiation has the least energy per phwj:oq4 -/kok 039ep i2k isjpfoton?

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

08.07: Which of the following types of electromagnetic radia 78tff)eprz 17;wixmcql p9q;tion has the greatest energy pe ;ipmzfx)7r1cqw ;lt8fp7 e9 qr photon?

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

09.25: Which of the following types of electromagnetic radiation has the large4a-ni9h(5tbg g / 8)qrmxbzzs st magnitude oz54 rqb/ah9m-x is8g ()tn gbzf momentum per photon?

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.04: Which station broadcasts with 3.27 m radio wavesnis lz:b9b f;*?

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

99.25: Pioneering radio station KFKA started broadcasting 78 years adqn n )f7a3.oy .*1uuimao+xpgo at 1.31 MHz on the AM dial. What is the approximate length of its + ynq.dmu1*pu3x fi.7oa ano)radio waves?

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

00.07: The length of the most effective transmitting antenna is eqplje:j0y kv64it 8h dl7j/b*hual to one-fourth the wavelengj7h0l 68v ly*tb4/: dpjhke ijth of the broadcast wave. If a radio station has an antenna 4.5 meters long then what is the broadcast frequency of the radio station?

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10#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

16.15: A radio station broadcasts its signal at a frequency of 100. jfifif*h6lk3* fze jq.m67d+0 MHz. What is the wavelength of the station’s sm7fef j6l+f 3ij*df6iq. h*k zignal?

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11#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

17.16: Which one of the following choices best represents the type of electroy9bje / n:mn9s4 itu1smagnetic wave associated ws b:1umi j4y/nt99senith a frequency of $10^{18}Hz$?

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12#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An electromagnetic wave has an electric field given by the gsk*y5n a)c:o0f6m9ym, qxp d expression (in Cartesian coordinate69sdmy a)yx n0ckmp5, :f*q ogs):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
09.48: What is the direction of the energy flow for the wave?

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13#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

An electromagnetic wave has adf:s00k zd+/s3ghwban electric field given by the expression (in Cartesian coordinatea0z0:3 fshdgk+d/b sws):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
09.49: What is the direction of the magnetic field at time t=0 and position x=0?

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14#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

11.48: An electromagnetic wave has a magnetic fx*l ubd uq(o, 4frm:h9re 7uf3ield given by the expression (in Cartesiand*e :uxhqfbrlfr 3 mu(,u79o4 coordinates) $\overrightarrow{B} = 6.0 \times\:10^{-6}cos(2.21\times\: 10^7z − 6.63\times\: 10^{15}t)\overrightarrow{x}$ . At t=0 and position x=y=z=0, what is the direction of the electric field associated with this wave?