AP EAMCET201822 Apr 2018Evening ShiftPhysicsMagnetic Effects of CurrentActual
A beam of protons enters a uniform magnetic field of 0.314 ~T with a velocity 4 10^5 ~ms ⁻¹ in a direction making an angle 60^ with the direction of the magnetic field.The path of the beam is (mass of proton .=1.6 10⁻²⁷ ~kg )
Options
- Aa circle of radius 0.2 m
- Ba straight line
- Ca helix with a pitch 4 cm
- Da helix with a pitch 4 mm
Correct answer
C. a helix with a pitch 4 cm
Step-by-step solution
As, v is not perpendicular to B , so path of particle is helix. aligned & Pitch of helical path =v 2 m B q & aligned & 4 10^5 1 2 2 1.6 10⁻²⁷ 0.314 1.6 10⁻¹⁹ & =4 ~cm aligned aligned