Suppose you are setting up the photoelectric effect experiment using the apparat

Question

Suppose you are setting up the photoelectric effect experiment using the apparatus we went over in the class. Which of the following changes to the experiment could increase of the maximum initial kinetic energy of the ejected electron? Select all that apply and give a brief reasoning for your choices. For Problem 1 and 2, do not consider the ejected electrons due to the healing. Only the electrons ejected instantaneously as soon as the light hits the metal plates should be taken into account. Increasing the intensity of the light beam Decreasing the intensity of the light beam Increasing the wavelength of light Decreasing the wavelength of light Increasing the frequency of light Decreasing the frequency of light Increasing the voltage of the battery Decreasing the voltage of the battery Replacing the target with a material that has a larger work function Replacing the target with a material that has a smaller work function Which of the changes listed in Problem 1(a) - (j) can increase tire number of electrons (i.e. increased current)? Select all that apply and give a brief reasoning.

Explanation / Answer

1)
maximim initial kinetic energy is proportional to energy of photon.

we know, energy of photon, E = h*c/lamda

a) False

When intensity is increased no of incident photons increases.

b) False

When intensity is decreased no of incident photons decreases.

c) False

when wavelength increases energy of photon decreases.

d) True

when wavelength decreases energy of photon increases.

e) True

when frequency increases energy of photon increases.

f) False

when frequency decreases energy of photon decreases.

g) False

h) Flase

i) False

j) True

2)

a) true

remaining all are false.

because, when intensity increases the no of incident photons increases.

so, no of electrons ejected also increases.

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