A 10 kW, 230 V, dc shunt machine has four terminals brought out through four leads.
For this machine
A. both the windings have thin leads
B. both the windings have thick leads
C. armature winding has thin leads whereas field winding has thick leads
D. armature winding has thick leads whereas field winding has thin leads
Answer: D
Share your understanding of this question with the correct explanation.
The correct answer is D. armature winding has thick leads whereas field winding has thin leads.
In a DC shunt machine, the armature winding carries the main load current, and therefore, it requires thick leads to handle the high current effectively and minimize resistive losses. The field winding, on the other hand, carries a relatively low current and is primarily responsible for generating the magnetic field. Hence, the field winding can have thinner leads compared to the armature winding.
Therefore, in the given machine, the armature winding has thick leads to handle the load current, while the field winding has thin leads as it carries a lower current.