Free Printable Photoelectric Effect

Worksheets

Photoelectric Effect

Total questions: 16

Worksheet time: 19mins

Name

Class

Date

A particle of light is called a...

Photoelectron

Photon

Proton

Electron

The only way to increase the number of photoelectrons emitted is by increasing the _________ of the light

Intensity

Wavelength

Frequency

Energy

What color of light has the greatest energy per photon?

Red

Green

Blue

Violet

The energy of photoelectrons emitted from a metal surface can be increased by

using light of higher frequency.

using light of longer wavelength.

using light of higher intensity.

using monochromatic, polarized light.

The photoelectric effect only occurs if the light shining on the metal is:

coherent.

above a minimum intensity.

above a minimum frequency.

above a minimum wavelength.

Does high-frequency or low frequency light cause the ejection of a greater number of electrons from a metal surface?

only high frequency

only low frequency

both of them

doesn't depend to frequency

What is the best description of 'threshold frequency'?

The minimum energy needed for electrons to escape a surface.

The maximum kinetic energy that an emitted electron has.

The minimum frequency of a photon that will cause an electron to be emitted.

The frequency that an emitted electron will have.

Photoelectric effect provides the evidence for the ______ nature of radiation.

dual

wave

particle

electromagnetic

If the brightness of a beam of light increases without changing its color, the ______ will increase.

number of photons

frequency of the light

energy of the photons

wavelength of the photons

10.

Light of a given wavelength is used to illuminate the surface of a metal. However, no photoelectrons are emitted. In order to cause electrons to be ejected, light of __________ should be used.

lower energy

higher intensity

shorter frequency

higher frequency

11.

What is the energy, in eV, of a photon that has a wavelength of 620 nm?

1eV

2eV

3eV

4eV

12.

The energy of a photon is directly proportional to its _____ and inversely proportional to its ______.

intensity - speed

wavelength - frequency

frequency - wavelength

intensity - wavelength

13.

Use the graph to find the threshold frequency.

−12×10^-19 Hz

0 Hz

2×10¹⁵ Hz

4×10¹⁵ Hz

14.

A metal with a work function of 3.5 eV is exposed to photons with an energy of 3.7 eV. What is the maximum kinetic energy of the emitted photoelectrons?

0.2 eV

0.9 eV

1.1 eV

7.7 eV

15.

What is the energy of a photon with a frequency of 5x10¹⁴ Hz? (you need to do calculation. You have enough time)

2.5x10^-19 J

3.0x10^-19 J

3.3x10^-19 J

4.5x10^-19 J

16.

What is the energy of a photon with a frequency of 5x10¹⁴ Hz? (you need to do calculation. You have enough time) h=6.6x10^-34 J/Hz