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

1#

94.31: Light of a single frequency falls on a photoelectric mae;a izcgau-a.p r3k -d twz2dp; 2.:tfterial but no electrons are emittediw2 p ;zd-t.3r;c afgat p. e-2zd:kau. Electrons may be emitted 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 Photop/6;0ijvsudbfg3)e tn..v i helectric Effect Experiment and obtains the data depicted/b; egvjfti3..0uiv6 hndp) s 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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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

96.28: A photon with frequency f behavesu4a 2t(:oyxrb/6z fbs 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 o9 mgi.*z9h jvdf ej- xyw 6yld)2*h)ysf light. The resulting value then is divided by three meters. This final value has the units of which one of the follow9yzj6*wge*)flx yh.9v)dj mi- syh d2ing 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 wavelengthskv4 fniuxp ;9*63yk5a3g axt t (in nm) of electromagnetic radiation will produce photoelectrons of pa93;x nv*3yf6 5taktxuigk4the 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 masv0u4c7hej f50/sbc fxs $4.00\times10^{-26}kg$ 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 surface. It is known (.dqn0/1cni j9r-a g5oqdhw a that the electrons ejected from the surface range in speed as 0 ≤ v ≤ 4.85q/cadin0 a(q1jhodr.ng- 9 w5 × 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 pot5yz5:, hj a. pw5w,jx r0nuc-w8zd sgvential of 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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