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?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 relationship forwn adoomw(5c816 l/ pl the speed v of the following three electromagnetic 8cwo1 m56nald o lwp/(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 spectrtc8j7fd z3n7 zum, rank the following electromagnetic waves in terfnjdt 737zc 8zms of increasing 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 travels through vacuum with a wavelength of(6,s: soqas,h9v a ecdt;ebq, 400 nm. Which one of the following cho ,,sba6a qs;ch edv ,o(9qset:ices best describes this 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 following types of electromagx)e0f1ov d/u b jiupo5 0q89ycnetic radiation has the least energy ppu )1 bc5 90j0ifqxo/8vyuedoer photon?

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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 radiation has tnun+e;ms,., y u wmom(he greatest enm.uwm;,m +(ye ,onsnuergy per 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 lakiox7q(rt88c nj d0*c rgest magnitude oct q id*(7knrc x8o0j8f 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 9b) mnezxdp+/eq -t) ybroadcasts with 3.27 m radio waves?

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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 bkpyfj --p+y:yd p 3wc-roadcasting 78 years ago at 1.31 MHz on the AM dial. What is the approximate length of its radio wav+ yfyj--:pdw pc-3k pyes?

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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 anten wfa */ ubvo (i/k4yutfvpe-*3na is equal to one-fourth the wavelength of the broadcast wave. If a radio station has an antenna 4.5 meters long then what is the broadcast frequ4t/iev pyfak*w- bv* 3(fuu/ oency 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 broa ejnyjkjv m)q)h (n8.8dcasts its signal at a frequency of 100.0 MHz. What is the wnm)j)(yej8 j qv 8k.nhavelength of the station’s signal?

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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 theqq(m03 u9np wsj2cv aby(-a 2qk,8yrj following choices best represents the type of electromag mpuq-0c 2jra,bqa(8nyk3vq(2 s9wjy netic wave associated with 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 eq((swq 05g:3z igbhbk lectric field given by the expression (in Cartes3 z0hkq5qi:(bbg (s wgian coordinates):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
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 an eg*tm3 t- m9cms+e xmmkaq*hr13i s-g 8lectric field given by the expression (in Cartesisxm8g3*rtcem-m3sgkh1 m* -a m qti+9 an coordinates):
$\overrightarrow{E}(x,t)\:=\:6.0cos(1.14\times\:10^7x-3.34\times\:10^{15}t)\overrightarrow{z}$
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 -hp-meht85zzjwj 5g* field given by the expression (in Cartesianwg8*mz -z-h5h j 5ptje 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?