A particle of mass m and charge q moves with a constant velocity v along the negative x−direction. It enters a region containing a uniform magnetic field B directed along the negative y−direction, extending from x=a to x=b. What is the minimum value of v required so that the particle can just enter the region x>b?
Answer & explanation
Correct answer: option 2
Velocity : v = \(\frac{qBr}{m}\)
r = b - a