DP Physics Questionbank

Description

Nature of science:
Models and visualization: Magnetic field lines provide a powerful visualization of a magnetic field. Historically, the field lines helped scientists and engineers to understand a link that begins with the influence of one moving charge on another and leads onto relativity. (1.10)

Understandings:

• Magnetic fields
• Magnetic force

Applications and skills:

• Determining the direction of force on a charge moving in a magnetic field
• Determining the direction of force on a current-carrying conductor in a magnetic field
• Sketching and interpreting magnetic field patterns
• Determining the direction of the magnetic field based on current direction
• Solving problems involving magnetic forces, fields, current and charges

Guidance:

• Magnetic field patterns will be restricted to long straight conductors, solenoids, and bar magnets

Data booklet reference:

International-mindedness:

• The investigation of magnetism is one of the oldest studies by man and was used extensively by voyagers in the Mediterranean and beyond thousands of years ago

Theory of knowledge:

• Field patterns provide a visualization of a complex phenomenon, essential to an understanding of this topic. Why might it be useful to regard knowledge in a similar way, using the metaphor of knowledge as a map – a simplified representation of reality?

Utilization:

• Only comparatively recently has the magnetic compass been superseded by different technologies after hundreds of years of our dependence on it
• Modern medical scanners rely heavily on the strong, uniform magnetic fields produced by devices that utilize superconductors
• Particle accelerators such as the Large Hadron Collider at CERN rely on a variety of precise magnets for aligning the particle beams

Aims:

• Aims 2 and 9: visualizations frequently provide us with insights into the action of magnetic fields; however, the visualizations themselves have their own limitations
• Aim 7: computer-based simulations enable the visualization of electromagnetic fields in three-dimensional space

Directly related questions

• 16N.1.SL.TZ0.21:

  A wire carrying a current $I$ is at right angles to a uniform magnetic field of strength B. A magnetic force F is exerted on the wire. Which force acts when the same wire is placed at right angles to a uniform magnetic field of strength 2B when the current is $\frac{I}{4}$?

  A. $\frac{F}{4}$

  B. $\frac{F}{2}$

  C. F 
  

  D. 2F

• 17M.1.SL.TZ1.15: Two pulses are travelling towards each other. What is a possible pulse shape when the pulses...
• 17M.1.SL.TZ1.21: An electron travelling at speed v perpendicular to a magnetic field of strength B experiences a...
• 17M.1.SL.TZ2.21: A positively-charged particle moves parallel to a wire that carries a current upwards. What is...
• 17M.1.HL.TZ2.17: The diagram shows the path of a particle in a region of uniform magnetic field. The field is...
• 17M.2.HL.TZ2.6d:

  The two cables in part (c) are suspended a constant distance apart. Explain how the magnetic forces acting between the cables vary during the course of one cycle of the alternating current (ac).

• 20N.1.SL.TZ0.20: A current in a wire lies between the poles of a magnet. What is the direction of the...
• 17N.1.SL.TZ0.20: The diagram shows two current-carrying wires, P and Q, that both lie in the plane of the paper....
• 17N.1.HL.TZ0.18: The diagram shows the magnetic field surrounding two current-carrying metal wires P and Q. The...
• 17N.2.HL.TZ0.2c: The cable between the satellites cuts the magnetic field lines of the Earth at right...
• 21M.1.SL.TZ1.21: A long straight vertical conductor carries a current I upwards. An electron moves with horizontal...
• 21M.1.HL.TZ1.18: An electron enters the space inside a current-carrying solenoid. The velocity of the electron...
• 21M.1.SL.TZ2.19: An ion moves in a circle in a uniform magnetic field. Which single change would increase...
• 21M.1.SL.TZ2.22: Magnetic field lines are an example of A. a discovery that helps us understand magnetism. B. a...
• 18M.1.SL.TZ1.19: A liquid that contains negative charge carriers is flowing through a square pipe with sides A, B,...
• 18M.2.SL.TZ1.5a:

  State the direction of the magnetic field.

• 18M.2.SL.TZ1.5b:

  Calculate, in N, the magnitude of the magnetic force acting on the electron.

• 18M.1.SL.TZ2.21: A beam of electrons moves between the poles of a magnet.                                        ...
• 21N.1.HL.TZ0.18: Two parallel wires carry equal currents in the same direction out of the paper. Which diagram...
• 21N.2.SL.TZ0.4c.ii: Determine the magnitude and direction of the resultant magnetic field at Q.
• 21N.2.SL.TZ0.4c.i: On the diagram draw an arrow to show the direction of the magnetic field at Q due to wire X alone.
• 21N.2.HL.TZ0.5c.ii:

  The resistance of the loop is 2.4 Ω. Calculate the magnitude of the magnetic force on the loop as it enters the region of magnetic field.

• 18N.1.HL.TZ0.18: Two parallel wires P and Q are perpendicular to the page and carry equal currents. Point S is...
• 18N.1.SL.TZ0.22: A particle of mass m and charge of magnitude q enters a region of uniform magnetic field B...
• 18N.1.SL.TZ0.21: Two parallel wires are perpendicular to the page. The wires carry equal currents in opposite...
• 22M.1.HL.TZ1.22: A conductor is placed in a uniform magnetic field perpendicular to the plane of the paper. A...
• 22M.1.HL.TZ2.19: The coil of a direct current electric motor is turning with a period T. At t = 0 the coil is in...
• 22M.1.SL.TZ2.22: A rectangular coil of wire RSTU is connected to a battery and placed in a magnetic field Z...
• 19M.2.HL.TZ2.5aii: Label with arrows on the diagram the velocity vector v of the proton.
• 19M.2.HL.TZ2.5bi:

  For this proton, determine, in m, the radius of the circular path. Give your answer to an appropriate number of significant figures.

• 19M.2.HL.TZ2.5ai: Label with arrows on the diagram the magnetic force F on the proton.
• 19M.1.SL.TZ1.23:

  A beam of negative ions flows in the plane of the page through the magnetic field due to two bar magnets.

  

  What is the direction in which the negative ions will be deflected?

  A. Out of the page $\odot$

  B. Into the page X

  C. Up the page ↑

  D. Down the page ↓

• 19M.2.SL.TZ2.5aii: Label with arrows on the velocity vector v of the proton.
• 19M.1.SL.TZ2.21: A horizontal wire PQ lies perpendicular to a uniform horizontal magnetic field. A length of...
• 19M.1.HL.TZ2.31: A proton of velocity v enters a region of electric and magnetic fields. The proton is not...
• 19M.1.HL.TZ1.19: A horizontal electrical cable carries a steady current out of the page. The Earth’s magnetic...
• 19M.2.SL.TZ2.5b:

  The speed of the proton is 2.16 × 10⁶ m s^-1 and the magnetic field strength is 0.042 T. For this proton, determine, in m, the radius of the circular path. Give your answer to an appropriate number of significant figures.

• 19M.1.HL.TZ1.18: Two currents of 3 A and 1 A are established in the same direction through two parallel straight...
• 19N.1.SL.TZ0.20: When a wire with an electric current I is placed in a magnetic field of strength B it experiences...
• 19N.2.SL.TZ0.4a: Explain why the path of the proton is a circle.
• 19N.2.SL.TZ0.4b(i):

  Show that the radius of the path is about 6 cm.