$1)(1$ pts$)$ A charged particle is placed in a magnetic field. Under what conditions would the particle

experience zero magnetic force? Select all that apply.

a$.$ The charged particle is moving at $90$ degrees relative to the magnetic field.

b$.$ The charged particle is moving parallel to the magnetic field.

c$.$ The charged particle is moving at $30$ degrees relative to the magnetic field.

d$.$ The charged particle is sitting at rest in the magnetic field.

$2)(1$ pts$)$ A charged particle is placed in a magnetic field. Under what conditions would the particle

experience the maximum magnetic force? Select all that apply.

a$.$ The charged particle is moving at $90$ degrees relative to the magnetic field.

b$.$ The charged particle is moving parallel to the magnetic field.

c$.$ The charged particle is moving at $30$ degrees relative to the magnetic field.

d$.$ The charged particle is sitting at rest in the magnetic field.