Two concentric current loops lie in the same plane. the smaller loop has a radius of 3.8 cm and a current of 12 a . the bigger loop has a current of 20 a . the magnetic field at the center of the loops is found to be zero. part a what is the radius of the bigger loop? express your answer with the appropriate units. r r = nothing nothing submitrequest answer provide feedback next

Explanation:

The equation for the magnetic field at the center of a circular loop is:

If we name the smaller loop as 1 and the bigger loop as 2 and we impose the same magnitude of the magnetic field at their center, we have:

Which for our values means:

(Notice that we don't need to convert cm to m, we get our result in cm).

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.