The answer is B. High voltage winding.
A transformer is a device that transfers electrical energy from one circuit to another without a change in frequency. It does this by using electromagnetic induction to create a magnetic field that induces a voltage in a second circuit.
The transformer has two windings: the primary winding and the secondary winding. The primary winding is connected to the input power source, and the secondary winding is connected to the load. The number of turns in each winding determines the voltage and current that are transferred.
The high voltage winding has more turns than the low voltage winding. This is because the voltage induced in the secondary winding is proportional to the number of turns in the secondary winding divided by the number of turns in the primary winding.
For example, if the primary winding has 100 turns and the secondary winding has 10 turns, then the voltage induced in the secondary winding will be 10 times the voltage applied to the primary winding.
The high voltage winding is usually insulated with a high-voltage insulation material, such as porcelain or glass. This is to prevent the high voltage from arcing across the windings.
The low voltage winding is usually insulated with a lower-voltage insulation material, such as paper or plastic. This is because the low voltage winding does not need to be insulated to the same level as the high voltage winding.
The transformer is a very important device in electrical engineering. It is used in a wide variety of applications, such as power transmission, power distribution, and electronics.