Question

The strength of a bar magnet's magnetic field decreases with distance according to what is known as an inverse cube law; multiplying the distance from the magnet by a factor of k divides the magnetic field strength by a factor of k^3 Suppose the magnetic field strength of the magnet is 64 Gauss at a distance of 10 away. What is the magnetic field strength of the magnet, 20cm away?

Answer 1

Answer:

It will not decrease and its 35cm away