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Magnetic Field — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsMagnetic Field1 Mark
Question
If a charged particle kept at rest experiences an electromagnetic force:
  1. The electric field must not be zero.
  2. The magnetic field must not be zero.
  3. The electric field may or may not be zero.
  4. The magnetic field may or may not be zero.
✓

Answer

  1. The electric field must not be zero.
  1. The magnetic field may or may not be zero.

Explanation:

Since particle is at rest, i.e. v=0, hence Fm=0

For electric force, E≠0

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