The formula for calculating the magnetic moment of a rotating charge is μ = qvr, where μ is the magnetic moment, q is the charge, v is the velocity, and r is the distance from the center of rotation.
The direction of rotation does not affect the magnitude of the magnetic moment, but it does determine the direction of the magnetic moment vector. The vector points in the direction of the axis of rotation according to the right-hand rule.
Yes, the magnetic moment of a rotating charge can be negative. This occurs when the direction of the charge's velocity is opposite to the direction of its rotation, resulting in a negative vector for the magnetic moment.
Increasing the charge increases the magnetic moment proportionally. This means that a charge with double the magnitude will have a magnetic moment that is also twice as large.
Yes, there is a direct relationship between the magnetic moment and the strength of the magnetic field. The stronger the magnetic moment, the stronger the resulting magnetic field will be.