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NEET2023PhysicsMagnetic 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 in the region such that its velocity is pointed along the direction of fields, then the electron

Options

  1. ASpeed will decrease
  2. BSpeed will increase
  3. CWill turn towards right of direction of motion
  4. DWill turn towards left of direction of motion

Correct answer

A. Speed will decrease

Step-by-step solution

Given condition is shown in figure Force due to magnetic field is given by F_m=q v B Here =0 F_m=0 Force due to electric field is F _e=q E Here, F _e=-e E Force due to electric field will be opposite to the direction of motion. Hence its speed will decrease.

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