QCEVault

Magnetic fields — Question 72

Original QCE Vault practice · 5 marks

Q72 · Practice questionComplex unfamiliar5 marks

QUESTION 72 (5 marks)

A proton enters a uniform 0.25 T0.25\,\text{T} magnetic field at 3.5×106 m s−13.5\times10^6\,\text{m s}^{-1} perpendicular to the field. Show that the magnetic force can provide the centripetal force, then determine the radius of the proton’s circular path and its orbital period.
Question linkSyllabus coverage

Related questions

  1. Q17 · Original practice · 1 mark
    A straight wire carries current out of the page, as shown. What is the direction of the magnetic field around the wire?
    Magnetic fields
  2. Q18 · Original practice · 1 mark
    A long solenoid has 750750 turns per metre and carries a current of 1.8 A1.8\,\text{A}. What magnetic flux density is produced inside it?
    Magnetic fields
  3. Q19 · Original practice · 1 mark
    An electron moves at 2.0×106 m s−12.0\times10^6\,\text{m s}^{-1} perpendicular to a 0.20 T0.20\,\text{T} magnetic field. What is the magnitude of the magnetic force?
    Magnetic fields
  4. Q20 · Original practice · 1 mark
    A 0.28 m0.28\,\text{m} wire carrying 4.0 A4.0\,\text{A} makes an angle of 60∘60^\circ with a 0.35 T0.35\,\text{T} magnetic field. What force acts on the wire?
    Magnetic fields