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Magnetics question

2020 · 2 Sep · Shift 1 · Q59
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Magnetics question

2020 · 2 Sep · Shift 1 · Q59

JEE MainPhysicsMagneticsMCQ+4 / −1
A beam of protons with speed 4 × 105 ms–1 enters a uniform magnetic field of 0.3 T at an angle of 60° to the magnetic field. The pitch of the resulting helical path of protons is close to : (Mass of the proton = 1.67 ×\times× 10–27 kg, charge of the proton = 1.69 ×\times× 10–19 C)
  1. A
    2 cm
  2. B
    12 cm
  3. C
    5 cm
  4. D
    4 cm
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