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

1#

94.31: Light of a single frequexmbp pv lvn vt 2)jf4 h8gk8vm/o49t(j;8gt )bncy falls on a photoelectric material but no electrons are emitted. Electrons may be emitted if t9lhv otpk tvv)2j8pf() jb 4nbmm/;gg48tvx8he:

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 and50uj wp25uodw obtains the data depicted in0pdw j 52w5uou 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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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.28: A photon with frequency f behaves as if it had a massk( v1+hpkw eql09zz+y 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 1 *0gu:aim tunmultiplied by the speed of light. The resulting value then is divided by three meters. This final value has the units of which one of the following quant0:tgum1* nauiities?

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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 md p78)buf +n0)oclwcelectromagnetic radiation will produce photoelectrons of the least kinetic energy if the radiati )f b7c8n owcpd0u+)mlon 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 ofo/piy*y )hb9 b mass $4.00\times10^{-26}kg$ 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 wavelength 250 nm shines onto a metallic sqk,-ulhcf0ea w,8l b,c y m+e+urface. It is known that the electrons ejected from the surface range in speed as 0 ≤ v ≤ 4.85× 105 m/s. What is the work function of the s+lk +l cae ,uc8,-yhwbq0me ,furface?

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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_idc()a lt-qo0xtv .+ a{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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