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Question

z-coordinate of the particle as a function of time after the magnetic field is switched on is
  1. mvqB[1cos(qBmt)]
  2. mvqB[1cos(qBmt)]
  3. mvqB[1+cos(qBmt)]
  4. mvqB[1+cos(qBmt)]

A
mvqB[1+cos(qBmt)]
B
mvqB[1cos(qBmt)]
C
mvqB[1cos(qBmt)]
D
mvqB[1+cos(qBmt)]
Solution
Verified by Toppr

The particle will travel in a parabolic trajectory OA.
Let the time to reach A is t0.
ay=qEm
x-coordinate of the point A is x=(2vcosθ)t0

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