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

1#

94.31: Light of a singln0n/n6kbyx /ae frequency falls on a photoelectric material but no electrons are emitted. Electrons may be emitte//ky6b a xn0nnd 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 Photoelectric Effect Experiment and obtains the da)la pf/w*vq5qh dw7m *yhqi :ld,97jata depicted in the accompanying 5lyf q,i 7m* )qahvwd7wlp/a9jhdq:*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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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.28: A photon with frequency f bebua )0g,ser-v haves 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 lighbgs j7mi wsv(t90 q(g,t. The resulting value then is divided by three meters. This final value has the units of which g ,g 09sqiwsb(tmjv 7(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 following wavelengths (in nm) of electromagnetic radiation gjl.c/ddr* 44z .gwk iwill produce photoelectrons of the least kinetic energy if the rakj* c.w dg4.dzg4r/l idiation 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 ml3a ma( sr/ev95a8eix ass $4.00\times10^{-26}kg$ 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 wavelengtzwuqu*7i9n k3npm.z 1n2 sx6o drp7b,h 250 nm shines onto a metallic surface. It is known that the electrons ejected from the surface range in speed as 0 ≤ nk7 o d3qu*wxp.1bmz s pz6n7 ,n2r9iuv ≤ 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 of V_{stecv+wc2z 2q b3go)zv /op}$ 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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