Which metal(s) can be used to produce electrons b the photoelectric effect from given source of light?

Barium only

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Barium or lithium

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Lithium, tantalum or tungsten

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Tungsten or tantalum

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Solution

The correct option is B Barium or lithium
$Δ E = \frac{12400}{5400 A^{o}}$
$Δ 2.75 e V$
For photoelectric effect, $Δ E > W_{0}$ (work function).

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Similar questions

Q. A physicist wishes to eject electrons by shining light on a metal surface. The light source emits light of wavelength of 450 nm. The table lists the only available metal and their work functions.

\begin{matrix} M e t a l & W_{0} (e V) B a r i u m & 2.5 L i t h i u m & 2.3 T a n t a l u m & 4.2 T u n g s t e n & 4.5 \end{matrix}

Which metal(s) can be used to produce electrons by the photoelectric effect from given source of light?

A student performs an experiment to observe photoelectric effect by shining light on a metal surface. The light source limits light of wavelength 450nm. The table given below lists the available metals and their corresponding work functions
$\begin{matrix} M e t a l & ϕ (e v) T u n g s t e n & 4.5 L i t h i u m & 2.3 B a r i u m & 2.5 T a n t a l u m & 4.2 \end{matrix}$

Which of the above metals can be used to produce electrons by the photoelectric effect from the given source of light?

According to the experiment of photoelectric effect, the number of electrons ejected from the metal surface is proportional to the intensity or brightness of light.

A point source of light is used in a photoelectric effect. If the source is removed farther from the emitting metal, the stopping potential
(a) will increase
(b) will decrease
(c) will remain constant
(d) will either increase or decrease

Q. The maximum wavelength of light that can be used to produce photoelectric effect on a metal is 250 nm. The maximum kinetic energy of the electrons in joule, emitted from the surface of the metal when a beam of light of wavelength 200 nm is used :

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Which metal(s) can be used to produce electrons b the photoelectric effect from given source of light?

The correct option is B Barium or lithiumΔE=124005400AoΔ2.75eVFor photoelectric effect, ΔE>W0 (work function).

The correct option is B Barium or lithium
$Δ E = \frac{12400}{5400 A^{o}}$
$Δ 2.75 e V$
For photoelectric effect, $Δ E > W_{0}$ (work function).