Which is a characteristic of a step down transformer

A transformer that increases voltage from primary  secondary winding turns is called a step-up transformer. Conversely, a transformer designed to do just the opposite is called a step-down transformer.

The correct answer is A) They're are fewer loops in the primary coil than in the secondary coil. 

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other