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Understanding the Photoelectric Effect

Authored by Uzma AKRAM

Mathematics

12th Grade

Used 1+ times

Understanding the Photoelectric Effect
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the photoelectric effect best explained by?

Theory of relativity

Particle theory of light

Wave theory of light

Quantum mechanics

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when a photon with enough energy hits an electron in a metal?

The photon is absorbed without effect

The electron is destroyed

The electron is emitted from the metal

The metal becomes superconductive

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the work function in the context of the photoelectric effect?

The maximum energy a photon can have

The energy required to change the state of the metal

The minimum energy needed to remove an electron from a metal

The amount of energy to break a metal into two

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the kinetic energy of a photoelectron depend on?

The type of metal only

The energy of the photon and the work function

The speed of light

The angle of photon incidence

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the frequency of the incident light is exactly equal to the threshold frequency, what happens to the photoelectron?

It transforms into a photon

It gains maximum kinetic energy

It remains bound within the metal

It is freed without any kinetic energy

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the momentum of a photon calculated if it is massless?

Using the formula p = mv

Using the formula p = h/λ

Through the energy-momentum relation E^2 = (pc)^2 + (mc^2)^2

It cannot have momentum

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of Planck's constant in the photoelectric effect?

It is used to calculate the energy of the photons

It determines the intensity of the incident light

It is irrelevant to the photoelectric effect

It represents the threshold frequency

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