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-PX-EL-0011 markL1 FoundationCalculatorSpecific charge

An electron beam passes undeflected through crossed fields:

E=2.0\times10^4

V m⁻¹ and

B=1.0\times10^{-3}

T. Calculate the electrons' speed in units of

10^7

m s⁻¹.

Salam Academy Original Practice · Proposed mark scheme

SA-PX-EL-0051 markL1 FoundationCalculatorMillikan

Millikan's oil-drop experiment showed that

Salam Academy Original Practice · Proposed mark scheme

SA-PX-EL-0061 markL1 FoundationCalculatorCathode rays

Thermionic emission is the release of electrons from

Salam Academy Original Practice · Proposed mark scheme

SA-PX-EL-0081 markL1 FoundationCalculatorSpecific charge

Thomson concluded that cathode rays were particles much smaller than atoms because their

Salam Academy Original Practice · Proposed mark scheme

SA-PX-EL-X011 markL1 FoundationCalculatorSpecific charge

Electrons pass undeflected through crossed fields

E=3.0\times10^4

V m⁻¹ and

B=2.0\times10^{-3}

T. Calculate their speed in units of

10^7

m s⁻¹.

Salam Academy Original Practice · Proposed mark scheme

SA-PX-EL-X021 markL1 FoundationCalculatorCathode rays

Calculate the kinetic energy gained by an electron accelerated through

200

V, in units of

10^{-17}

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SA-PX-EL-X031 markL1 FoundationCalculatorMillikan

An oil drop carries a charge of

4.8\times10^{-19}

C. How many excess electrons is this?

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SA-PX-EL-0022 marksL2 StandardCalculatorCathode rays

Electrons are accelerated from rest through

1000

V. Using

\frac em=1.76\times10^{11}

C kg⁻¹, calculate their speed in units of

10^7

m s⁻¹.

Salam Academy Original Practice · Proposed mark scheme

SA-PX-EL-0032 marksL2 StandardCalculatorSpecific charge

With the electric field switched off, electrons at

2.0\times10^7

m s⁻¹ move in a circle of radius

0.114

m in a field of

1.0\times10^{-3}

T. Calculate

\frac em

in units of

10^{11}

C kg⁻¹.

Salam Academy Original Practice · Proposed mark scheme

SA-PX-EL-0042 marksL2 StandardCalculatorMillikan

An oil drop of mass

3.26\times10^{-15}

kg is held stationary between plates

10

mm apart with a p.d. of

1000

V. Calculate its charge in units of

10^{-19}

Salam Academy Original Practice · Proposed mark scheme

SA-PX-EL-X042 marksL2 StandardCalculatorSpecific charge

Combine

e=1.60\times10^{-19}

C and

\frac em=1.76\times10^{11}

C kg⁻¹ to find the electron mass, in units of

10^{-31}

kg.

Salam Academy Original Practice · Proposed mark scheme

SA-PX-EL-0072 marksL3 ExamCalculatorSpecific charge

Electrons accelerated through

V=2000

V move in a circle of radius

0.15

m in a field of

B=1.0\times10^{-3}

T. Using

\frac em=\frac{2V}{B^2r^2}

, calculate

\frac em

in units of

10^{11}

C kg⁻¹.

Salam Academy Original Practice · Proposed mark scheme