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likoan [24]
3 years ago
6

What is the maximum kinetic energy of ejected electrons when photons of wavelength 300 nm hit a metal that has a work function o

f 1.13 ev? A. 0.50 ev B. 1.0 ev C. 2.0 ev D. 3.0 eV E. 4.0 ev
Physics
1 answer:
Sonja [21]3 years ago
3 0

Explanation:

Given that,

Wavelength of the photon, \lambda=300\ nm=3\times 10^{-7}\ m

Work function of the metal, \phi=1.13\ eV=1.81\times 10^{-19}\ J

We need to find the maximum kinetic energy of the ejected electrons. It can be calculated using Einstein's photoelectric equation as :

hf=E_k+\phi

E_k=hf-\phi

E_k=h\dfrac{c}{\lambda}-\phi

E_k=6.63\times 10^{-34}\times \dfrac{3\times 10^8}{3\times 10^{-7}}-1.81\times 10^{-19}

E_k=4.82\times 10^{-19}\ J

E_k=3.01\ eV

or

E_k=3\ eV

So, the maximum kinetic energy of the ejected electrons is 3 ev. Hence, this is the required solution.          

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<h3>What is resistance?</h3>

Resistance is a type of opposition force due to which the flow of current is reduced in the material or wire. Resistance is the enemy of the flow of current.

The energy in terms of the charge and potential difference is;

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