🔋college physics i – introduction review

key term - B-field

Definition

The B-field, or magnetic field, is a vector field that represents the influence of magnetic forces in a region. It is denoted by the symbol $\mathbf{B}$ and is measured in teslas (T).

5 Must Know Facts For Your Next Test

  1. A B-field exerts a force on moving electric charges, described by the Lorentz force law: $\mathbf{F} = q(\mathbf{v} \times \mathbf{B})$.
  2. Magnetic field lines form continuous loops from the north pole to the south pole of a magnet.
  3. The strength of a B-field decreases with distance from the source, following an inverse square law for point sources.
  4. Inside a solenoid, the B-field is uniform and parallel to the axis of the solenoid.
  5. Earth has its own B-field, which protects us from solar wind and cosmic radiation.

Review Questions

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