# Photoelectric Effect MCQ Quiz

10 Questions | Attempts: 4881  Settings  The photoelectric effect is an interesting topic in Physics. How well do you understand this concept? Here is a short and simple 'Photoelectric Effect MCQ Quiz' that consists of a set of questions based on the same topic. Try this quiz and you will get to check your understanding of the photoelectric effect. So, do you feel ready to take this test? This might also help you in revising your concepts. So give it a try and see how much score you can make.

• 1.
What is the term used to refer to the minimum energy required for a photoelectron to escape from a metal plate in a photocell?
• A.

Stopping voltage

• B.

Planck’s constant

• C.

Threshold wavelength

• D.

Work function

• 2.
Name the radiations that will be most effective for the emission of electrons from a metallic surface.
• A.

Ultraviolet rays

• B.

X rays

• C.

Infrared

• D.

Microwaves

• 3.
Threshold frequency is to work function as hertz is to which one of the following?
• A.

Coulomb

• B.

Joule

• C.

Newton

• D.

Watt

• 4.
The variable that varies directly with the amount of current produced by photoelectrons
• A.

The intensity of the incident light

• B.

The frequency of the incident light

• C.

The wavelength of the incident light

• D.

The work function of the metal surface

• 5.
The threshold frequency has a value of X.  If the frequency of the incident light increases from 2X to 4X, then the resulting current of photoelectrons
• A.

Is doubled

• B.

Is increased by a factor or 3

• C.

Reduced by half

• D.

Remains the same

• 6.
When electromagnetic radiation with a wavelength of 350 nm falls on a metal, the maximum kinetic energy of the ejected electrons is 1.20 eV.  What is the work function of the metal?
• A.

1.3 eV

• B.

2.4 eV

• C.

5.4 eV

• D.

5.7 eV

• 7.
Calculate the wavelength of a photon with 3.2 × 10–19 J of energy.
• A.

210 nm

• B.

420 nm

• C.

530 nm

• D.

620 nm

• 8.
The graph below shows the relationship between the frequency of radiation incident on a photosensitive surface and the maximum kinetic energy of the emitted photoelectrons What does point P represent?
• A.

Fundamental frequency

• B.

Photoelectron frequency

• C.

Photon escape frequency

• D.

Threshold frequency

• 9.
The work function of a particular photo-emissive material is 4.0 eV.  If photons with 16 eV of energy are incident on the material, what would be the maximum kinetic energy of the ejected photoelectrons?
• A.

0.25 eV

• B.

4.0 eV

• C.

12 eV

• D.

20. eV

• 10.
When a photon collides with an electron, its wavelength will ______.
• A.

Decrease

• B.

Increase

• C.

Remain unchanged

• D.

None of the above

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