# Magnetic Field from Magnetic Vector Potential

A sphere is centered at the origin with radius 3m. It has a total charge of 100 micro-Coulombs spread uniformly over its surface and is spinning with 3600 revolutions per minute.

1. What is the magnitude and direction of the magnetic field inside the sphere?

a. B=0

2. Given the magnetic vector potential (see in attachment), find the magnetic field at position r=<4,6,8>m

© BrainMass Inc. brainmass.com October 10, 2019, 7:04 am ad1c9bdddfhttps://brainmass.com/physics/electricity-magnetism/magnetic-field-magnetic-vector-potential-566974

#### Solution Summary

This solution estimates a point outside and inside the sphere, where a magnetic field due to a rotating sphere is uniformly charged on the surface.

$2.19