Question

earths magnetic field does not affect

a. other planets
b. moving charged particles
c. permanent magnets
d. electromagnets

Explanation:

• Earth's magnetic field is relatively weak on a cosmic scale compared to the vast distances between planets. Planets have their own magnetic fields (in some cases) or are governed by other gravitational and orbital forces.
• Moving charged particles ($F = qvB\sin\theta$, where $F$ is the magnetic force, $q$ is charge, $v$ is velocity, $B$ is magnetic field) are affected by Earth's magnetic field. Permanent magnets and electromagnets interact with Earth's magnetic field as they are magnetic materials.

Answer:

A. other planets