A large circular loop of radius b b has a current I b Ib passing through it. The loop is held horizontally with its plane parallel to the ground. A much smaller circular loop of radius a a ( a << b a<

Complete Question

The complete question is shown on the first uploaded image

The formula for mutual inductance of two concentric loops

Explanation:

Generally magnetic field in a concentric coplanar loop  is mathematically represented as

                 

         Where is the permeability o free space

                     R is the radius

                    is the current

The magnetic flux  of two concentric loops is mathematically represented as

             

                 

      a is the area

Generally magnetic inductance is mathematically represented as

               

Substituting for   in the above equation

             

               

Ithink it is letter b, i may be wrong but i think that is the answer

The chemical reactions lab we did is typically called a "copper plating lab,  because the acid solution cleaned the pennies and made the copper look shinier;   the acid solution cleaned the paperclips and made them look like pennies;   &   the copper from the pennies was removed, and then added to the paperclips.