B=k I/r
so if you reduce r by a factor of 1/10, B is now x10, or 1 Tesla
The magnetic field 0.02 m from a wire is 0.1 T. What is the magnitude of the magnetic field 0.01 m from the same wire?
5 answers
that's not one of the choices
Here are the choices:
0.01 T
0.05 T
0.1 T
0.2 T
0.01 T
0.05 T
0.1 T
0.2 T
oops, you should have caught my error. You reduced distance by 1/2, so B is twice or .2T
Its B Duhhhhh easy