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-MF2-0011 markL1 FoundationCalculatorCharges in B fields

An electron moves at

3.0\times10^7

m s⁻¹ perpendicular to a

2.0

mT field. Calculate the force on it, in units of

10^{-15}

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0031 markL1 FoundationCalculatorHall effect & selectors

Crossed fields of

E=6.0\times10^4

V m⁻¹ and

B=0.20

T form a velocity selector. Calculate the speed of particles that pass undeflected, in units of

10^5

m s⁻¹.

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0041 markL1 FoundationCalculatorCharges in B fields

A charged particle moves in a circle in a uniform magnetic field. The work done by the magnetic force on it is

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0071 markL1 FoundationCalculatorHall effect & selectors

Hall probes use semiconductors rather than metals because semiconductors

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0081 markL1 FoundationCalculatorCharges in B fields

A charged particle's speed is doubled in the same magnetic field. State the factor by which the radius of its circular path changes.

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0121 markL1 FoundationCalculatorCharges in B fields

A charged particle moving parallel to a magnetic field experiences

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0022 marksL2 StandardCalculatorCharges in B fields

Calculate the radius of the electron's path in the previous question, in cm. (

m_e=9.11\times10^{-31}

kg)

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0051 markL2 StandardCalculatorCharges in B fields

A proton and an electron enter the same magnetic field at the same speed, perpendicular to it. Compared with the electron's path, the proton's path

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0062 marksL2 StandardCalculatorHall effect & selectors

A semiconductor slice of thickness

0.20

mm has

n=1.0\times10^{22}

m⁻³. It carries

10

mA in a field of

0.50

T. Calculate the Hall voltage, in mV.

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0091 markL2 StandardCalculatorHall effect & selectors

In a velocity selector, particles moving faster than

\dfrac EB

are

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0101 markL2 StandardCalculatorCharges in B fields

A proton moves in a circle of radius

0.50

m in a field of

0.10

T. Calculate its speed, in units of

10^6

m s⁻¹. (

m_p=1.67\times10^{-27}

kg)

Salam Academy Original Practice · Proposed mark scheme

SA-9702-MF2-0113 marksL3 ExamCalculatorCharges in B fields

An electron is accelerated from rest through

400

V, then enters a

1.5

mT field at right angles. Calculate the radius of its path, in cm. (

m_e=9.11\times10^{-31}

kg;

e=1.60\times10^{-19}

Salam Academy Original Practice · Proposed mark scheme