Photoelectric Effect - 无忧得胜-网上国际课程 (5edu.win)

1#

94.31: Light of a single frequency end6 3wcpnbjxy,21 y;falls on a photoelectric material but no electrons are emitted. Electrons may be em cw;ny2yn p1e3dbjx,6itted if the:

A. frequency of the light is decreased.

B. frequency of the light is increased.

C. intensity of the light is decreased.

D. intensity of the light is increased.

E. velocity of the light is increased.

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

97.36: A student performs the Photoelect*qwz t 0y(f4gegibw4mor snd2(g /6 4rric Effect Experiment and obtains the data depicteqe2n(r sr*4yt i/0w4 m 6g(f4bdwo zggd in the accompanying graph of $E_{Km}$, the maximum kinetic energy of the photoelectrons in eV, versus f, the frequency of the photons in $10^{14}$ Hz. What is the approximate work function for this material?

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本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.28: A photon with frequency f behav ;q. */i7ijgsfwg.be wes as if it had a mass equal to:

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

14.32: Planck’s constant is multiplied by the speed of light:uy( ls4w4 cyif tnf/vl r*;d+. The resulting value then is divideds fldr /4(yl *:;fnwutv4y +ic by three meters. This final value has the units of which one of the following quantities?

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

10.48: Which of the follvu 2xx i-0qp7uowing wavelengths (in nm) of electromagnetic radiation will pro2uivp qxu0x-7 duce photoelectrons of the least kinetic energy if the radiation is incident on a material with a work function of 4.80 eV?

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.45: A stationary atom of mascc)f 7lnqn)+k)dyc1ps $4.00\times10^{-26}kg$ spontaneously emits a photon of energy 10.0 eV. Which one of the following choices best represents the speed, in units of m/s, of the atom after emitting the photon?

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

16.45: Light of wavelengtjhmd+*7rz i: lfpe)-rh 250 nm shines onto a metallic surface. It is known that the elect ep zj+mr:-l r7*fid)hrons ejected from the surface range in speed as 0 ≤ v ≤ 4.85× 105 m/s. What is the work function of the surface?

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.46: In the photoelectric effect experiment, a stopping potential ofayt3 o th,/-)5:r2i ahcrs sko V_{stop}$ is needed when light of frequency $f_0$ shines on the electron-emitting metal surface. If the metal surface on which the light shines is replaced with a new material that has half the work function, what is the new stopping potential ???????????????? , for light of frequency $f_0$ shining on it?

A. $V_{new}\:>2V_{stop}$

B. $V_{new}\:=2V_{stop}$

C. $V_{stop}<V_{new}\:<2V_{stop}$

D. $V_{new}\:=V_{stop}$

E. It is indeterminate with the given information

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