The Photoelectric effect had profound consequences in the world of Physics. It proved that...

• Electrons are waves

• Light displayed particle-like behaviour

• Light was a wave

• The energy of electrons emitted was quanitzed

Tags

NGSS.HS-PS4-3

The amount of energy required to cause an electron to emit is called the

• Threshold Frequency

• The Kinetic Energy Max

• The Intensity

• The Work Function

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NGSS.HS-PS4-3

The equation which links Energy to wavelength is...

• $E=hf$

• $E=\frac{hf}{\lambda}$

• $E=\frac{hc}{\lambda}$

• $c=f\lambda$

Tags

NGSS.HS-PS4-1

Which graph is the correct graph linking KE max of the electrons emitted to the frequency of the light?

• A

• B

• C

• D

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NGSS.HS-PS4-1

NGSS.HS-PS4-3

Which of the following is true

• All electrons are emitted with the same energy because it's one metal surface

• Electrons are emitted with a range of energies up to infinite.

• Electrons are emitted up to a range of energies up to a maximum value

• The intensity of the light will decide the Kinetic Energy Max.

Tags

NGSS.HS-PS4-3

The work functions of different metals are shown. What is the work function of Aluminium in Joules?

• 2.7 x 10¹⁹

• 6.8x10^-19

• 6.8 x 10¹⁹

• 2.7x10^-19

Tags

NGSS.HS-PS1-1

Which statement is correct. Use your logic.

• KE max = hf + φ

• φ = hf + KE max

• KE max = φ - hf

• KE max = hf - φ

Tags

NGSS.HS-PS4-3

What happens if the intensity of the light is increased

• The stopping potential is greater

• The current increases

• The colour of the light changes

• The work function becomes higher

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NGSS.HS-PS2-5

NGSS.HS-PS4-1

NGSS.HS-PS4-3

In the Photoelectric effect apparatus, which is used to measure Plank's constant, what happens if the wavelength of light is increased slightly?

• The current reduces

• The work function increases

• The stopping potential increases

• the KE max decreases

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

What is the significance of the gradient in the graph?

• It gives Plank's constant

• It gives the work function

• It gives the energy of the incoming light

• It gives the stopping potential

Tags

NGSS.HS-PS4-3