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JEE Main2005PhysicsMagnetic Effects of CurrentActual

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity then

Options

  1. Aits velocity will decrease.
  2. Bits velocity will increase.
  3. Cit will turn towards right of direction of motion.
  4. Dit will turn towards left of direction of motion

Correct answer

A. its velocity will decrease.

Step-by-step solution

F =-e[ E + v B ]=-e E a =- e E m v(t)=v_ - e E m t

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