A charged particle is moving perpendicular to a uniform magnetic ...

[Melani1276]

A charged particle is moving perpendicular to a uniform magnetic field. The radius of its path can be decreased most by
  1.decreasing the magnitude of the magnetic field.
  2.increasing its velocity.
  3.decreasing its velocity and increasing the magnitude of the magnetic field.
  4.increasing its velocity and decreasing the magnitude of the magnetic field.

Question 2

A circular current loop with radius r has a magnetic dipole moment . To gain the greatest increase in its magnitude, you could
  1.double the radius and maintain the current.
  2.double the radius and halve the current.
  3.halve the radius and double the current.
  4.double the current and maintain the radius.

[stanleka1]

Answer to Question 1

3

Answer to Question 2

1

[Melani1276]

Thanks for the timely response, appreciate it

[chereeb]

Gracias!