Question

Compare the thickness of secondary coil of a step-up transformer with the primary coil

• A. Secondary coil is thinner as compared to its primary coil so that the secondary coil has greater resistance than primary
• B. Primary coil is thinner as compared to its Secondary coil so that the secondary coil has greater resistance than primary
• C. Secondary coil is thinner as compared to its primary coil so that the secondary coil has smaller resistance than primary
• D. Secondary coil has same thickness as the primary coil
• E. The thickness depends on the material of the coil and the strength of the currents in the two coils

Answer 1

The correct option is A

Secondary coil is thinner as compared to its primary coil so that the secondary coil has greater resistance than primary

A step-up transformer increases voltage & decreases current & thus the secondary coil of a step-up transformer has smaller current than primary & thus its secondary coil is thinner as compared to its primary coil so that the secondary coil has greater resistance than primary.

The secondary coil of a step-down transformer has greater current than primary & thus its secondary coil is thicker as compared to its primary coil.