IB Physics Topic D.3 Motion in Electromagnetic Fields…

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IB Physics Topic D.3 Motion in Electromagnetic Fields… | RevisionDojo

Question

SLPaper 2

An electron gun is used to produce a narrow beam of electrons which enters a region of uniform magnetic field. The electrons follow a circular path in this magnetic field.

(a)

the direction of the force acting on an electron when it enters the magnetic field perpendicularly.

[1]

(b)

Write an equation for the magnetic force acting on a charged particle moving in a magnetic field.

[1]

(c)

the path taken by the electron in the magnetic field and the cause of this motion.

[2]

(d)

the speed of an electron accelerated from rest through a potential difference of 4.0 kV.

[2]

(e)

the radius of the circular path taken by the electron in a magnetic field of 0.30 T.

[3]

(f)

why a vacuum is necessary in the tube containing the electron beam.

[1]

SLPaper 2

In a laboratory experiment, singly ionized calcium ions (Ca⁺) of mass $6.66 \times 10^{-26}\ \text{kg}$ and charge $1.60 \times 10^{- 19}$ are accelerated through a potential difference of 5.0 kV before entering a uniform magnetic field of strength . The magnetic field is perpendicular to the velocity of the ions.

SLPaper 1A

A wire of length $0.50\ \mathrm{m}$ carries a current of $3.0\ \mathrm{A}$ perpendicular to a uniform magnetic field of $0.40\ \mathrm{T}$ . If the wire is suspended horizontally and remains motionless, what is the minimum mass that the wire must have per unit length?

SLPaper 1A

A charged particle moves at speed $v$ in a uniform magnetic field $B$ , entering at an angle $\theta$ to the field direction. What is the shape of its trajectory?

SLPaper 1A

A beam of electrons travels in a region with perpendicular electric and magnetic fields. The electric field is $200\ \mathrm{V\ m}^{-1}$ and the magnetic field is $0.50\ \mathrm{mT}$ . What is the speed of the electrons if they move undeflected?

Practice IB Physics Topic D.3 Motion in Electromagnetic Fields with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for D.3 Motion in Electromagnetic Fields and mirrors Paper 1A, 1B, 2 style where relevant.

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C

1.60 \times 10^{-19}\ \text{C}

IB Physics D.3 Motion in Electromagnetic Fields Questionbank

IB Physics D.3 Motion in Electromagnetic Fields Questionbank

IB Physics D.3 Motion in Electromagnetic Fields Questionbank

IB Physics D.3 Motion in Electromagnetic Fields Questionbank

IB Physics Topic D.3 Motion in Electromagnetic Fields Questionbank