Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

TopicSkillDifficulty

12 questions

SA-9702-QP1-0012 marksL1 FoundationCalculatorPhotons

Calculate the energy of a photon of wavelength

500

nm, in units of

10^{-19}

J. (

h=6.63\times10^{-34}

J s;

c=3.00\times10^8

m s⁻¹)

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SA-9702-QP1-0021 markL1 FoundationCalculatorPhotons

Convert

3.98\times10^{-19}

J to electronvolts.

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SA-9702-QP1-0041 markL1 FoundationCalculatorPhotoelectric effect

The work function of a metal is

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SA-9702-QP1-0061 markL1 FoundationCalculatorPhotoelectric effect

The intensity of light on a photoelectric surface is doubled (frequency unchanged, above threshold). The maximum kinetic energy of the photoelectrons

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SA-9702-QP1-0091 markL1 FoundationCalculatorPhotoelectric effect

Light below the threshold frequency falls on a metal. Increasing its intensity

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SA-9702-QP1-0101 markL1 FoundationCalculatorPhotons

The wavelength of light is halved. State the factor by which the photon energy changes.

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SA-9702-QP1-0121 markL1 FoundationCalculatorPhotons

A photon is

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SA-9702-QP1-0032 marksL2 StandardCalculatorPhotoelectric effect

Ultraviolet light with photons of energy

4.97

eV falls on zinc, work function

4.30

eV. Calculate the maximum kinetic energy of the photoelectrons, in eV.

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SA-9702-QP1-0052 marksL2 StandardCalculatorPhotoelectric effect

A metal has work function

2.3

eV. Calculate its threshold frequency, in units of

10^{14}

Hz. (

h=6.63\times10^{-34}

J s)

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SA-9702-QP1-0071 markL2 StandardCalculatorPhotoelectric effect

On a graph of

E_{k\max}

against frequency for photoelectrons, the gradient is

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SA-9702-QP1-0081 markL2 StandardCalculatorPhotons

Calculate the momentum of a photon of wavelength

500

nm, in units of

10^{-27}

kg m s⁻¹. (

h=6.63\times10^{-34}

J s)

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SA-9702-QP1-0113 marksL3 ExamCalculatorPhotoelectric effect

Light of wavelength

400

nm falls on a metal of work function

2.0

eV. Calculate the maximum speed of the photoelectrons, in units of

10^5

m s⁻¹. (

h=6.63\times10^{-34}

J s;

c=3.00\times10^8

m s⁻¹;

m_e=9.11\times10^{-31}

kg;

e=1.60\times10^{-19}

Salam Academy Original Practice · Proposed mark scheme