Which winding in a transformer has lesser number of turns?
Explanation: Primary winding used in a transformer, can be at higher or lower voltage potential, depending on the number of turns with secondary winding. For step up and step-down transformers primary winding will be at lower and higher potential respectively.
Which winding of the DC motor has less cross sectional area?
The value of Ra is very small while Rb is quite large >> Hence shunt field winding has more number of turns with less cross-sectional area. The voltage across armature and field winding is same equal to the supply voltage V.
Which side of transformer has more turns?
Explanation: High voltage winding always has a large number of turns, as voltage is directly proportional to the number of turns. If large numbered winding is present on primary side then the transformer is step down transformer.
Which winding in a transformer has?
Winding – Transformers have two windings, being the primary winding and the secondary winding. The primary winding is the coil that draws power from the source. The secondary winding is the coil that delivers the energy at the transformed or changed voltage to the load.
Which type of losses does not occur in transformer?
Explanation: Windage and friction losses occur in rotating parts of a machine generally in rotor of the machine, thus they will never occur in transformer, as transformer does not contain any rotating part at its secondary unlike induction motor. 11.
In which of the following the transformer winding has got more cross sectional area?
Explanation: Winding having less cross-sectional area may be primary or secondary winding. For high voltage winding cross sectional area is less while for low voltage winding cross sectional are is more, due to inverse proportionality.
Which material is used in yoke of small capacity DC machine?
Yoke: The outer frame of a dc machine is called a yoke. It is made up of cast iron or steel. In small DC machines, it is made up of cast iron and in the case of large DC machines, it is made up of cast steel.