Find the magnetic field inside a uniformly charged sphere of total charge q and radius r that is rotating at a constant angular velocity

Deriving the answer to this question can get involved. I am giving the formula only and am assuming you are looking for the magnetic field B at the center point of the sphere. If the sphere rotates with angular velocity along, say, z axis, then the formula for B is as follows:

(with mu the magnetic permeability)

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

heats surface water up