IB Physics Topic Topic D - Fields Questionbank (SL/HL)

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IB Physics Topic Topic D - Fields Questionbank (SL/HL) | RevisionDojo

Paper

Level

Difficulty

Question 1

SLPaper 2

View answer

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)

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

[1]

(b)

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

[1]

(c)

[2]

(d)

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

[2]

(e)

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

[3]

(f)

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

[1]

Question 2

SLPaper 2

View answer

The Moon orbits the Earth at an average distance of $3.84 \times 10^8\ \text{m}$ . The mass of the Earth is $5.97 \times 10^{24}\ \text{kg}$ and $G = 6.67 \times 10^{-11}\ \text{N m}^2 \text{kg}^{-2}$ .

(a)

(a) the direction of the gravitational field produced by the Earth.

[1]

(b)

(b) the gravitational field strength at the Moon’s orbit due to the Earth.

[2]

(c)

[1]

Question 3

HLPaper 2

View answer

A coil of wire with $N = 150$ turns is placed in a region where the magnetic flux through the coil changes uniformly from $2.0 \times 10^{-4}\ \text{Wb}$ to $0$ in $0.10\ \text{s}$ .

(a)

(a) Faraday’s law of electromagnetic induction.

[1]

(b)

(b) the magnitude of the average induced emf in the coil.

[2]

(c)

[1]

Question 4

SLPaper 2

View answer

In a laboratory experiment, singly ionized calcium ions (Ca⁺) of mass $6.66 \times 10^{-26}\ \text{kg}$ and charge $1.60 \times 10^{-19}\ \text{C}$ are accelerated through a potential difference of 5.0 kV before entering a uniform magnetic field of strength $0.45\ \text{T}$ . The magnetic field is perpendicular to the velocity of the ions.

(a)

(a) the final speed of the calcium ions after acceleration.

[2]

(b)

(b) the radius of the path followed by the ions in the magnetic field.

[3]

(c)

[2]

(d)

(d) why mass spectrometers must be operated under low-pressure conditions.

[1]

(e)

(e) on the path shape if the ions entered the magnetic field at an angle other than $90^\circ$ to the field lines.

[1]

Question 5

SLPaper 1A

View answer

Which of the following correctly describes the force acting between two point masses due to gravity?

Repulsive and depends on their velocities

Attractive and depends only on their charges

Attractive and acts along the line joining the masses

Repulsive and decreases linearly with distance

Unlock all 388 questions with a free account

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

Get instant solutions, detailed explanations, and build confidence with questions aligned to IB examiner expectations.

Paper

Level

Difficulty

Question 1

SLPaper 2

View answer

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)

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

[1]

(b)

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

[1]

(c)

[2]

(d)

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

[2]

(e)

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

[3]

(f)

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

[1]

Question 2

SLPaper 2

View answer

(a)

(a) the direction of the gravitational field produced by the Earth.

[1]

(b)

(b) the gravitational field strength at the Moon’s orbit due to the Earth.

[2]

(c)

[1]

Question 3

HLPaper 2

View answer

A coil of wire with $N = 150$ turns is placed in a region where the magnetic flux through the coil changes uniformly from $2.0 \times 10^{-4}\ \text{Wb}$ to $0$ in $0.10\ \text{s}$ .

(a)

(a) Faraday’s law of electromagnetic induction.

[1]

(b)

(b) the magnitude of the average induced emf in the coil.

[2]

(c)

[1]

Question 4

SLPaper 2

View answer

(a)

(a) the final speed of the calcium ions after acceleration.

[2]

(b)

(b) the radius of the path followed by the ions in the magnetic field.

[3]

(c)

[2]

(d)

(d) why mass spectrometers must be operated under low-pressure conditions.

[1]

(e)

(e) on the path shape if the ions entered the magnetic field at an angle other than $90^\circ$ to the field lines.

[1]

Question 5

SLPaper 1A

View answer

Which of the following correctly describes the force acting between two point masses due to gravity?

Repulsive and depends on their velocities

Attractive and depends only on their charges

Attractive and acts along the line joining the masses

Repulsive and decreases linearly with distance

Unlock all 388 questions with a free account

Get instant solutions, detailed explanations, and build confidence with questions aligned to IB examiner expectations.

IB Physics Topic D - Fields Questionbank

IB Physics Topic D - Fields Questionbank

Unlock all 388 questions with a free account

Unlock all 388 questions with a free account