Avery thin circular disk of radius r = 20.00 cm has charge q = 30.00 mc uniformly distributed on its surface. the disk rotates at a constant angular velocity ω = 5.00 rad/s around the z-axis through its center. calculate the magnitude of the magnetic field strength on the z axis at a distance d = 2.000 × 103 cm from the center. note that d > > r.

Explanation:

The magnetic field strenght on the z-axis at a distance d from the center is,

Our values are:

Replacing,

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6