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Question: Answered & Verified by Expert

A charged particle (mass m and charge q) moves along X axis with velocity V0. When it passes through the origin it enters a region having uniform electric field E=-Ej^ which extends upto x=d. Equation of path of electron in the region x>d is:

PhysicsMagnetic Effects of CurrentJEE MainJEE Main 2020 (02 Sep Shift 1)
Options:
  • A y=qEdmv02x-d
  • B y=qEdmv02d2-x
  • C y=qEdmv02
  • D y=qEd2mv02x
Solution:
2301 Upvotes Verified Answer
The correct answer is: y=qEdmv02d2-x

x>d path is straight line

-y-12at2x-d=atV0

-y-12at2at=x-dV0

-yat-12dV0=xV0-dV0

-myV0qEd=xV0-d2V0

y=-qEdmV0xV0-d2V0

y=qEdmV02d2-x.

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