Class 4 (4th Engineer) MET 📅 Jun 2025

Exam Question

(a) What are the different types of DC motors? (6)

(b) A 10 H.P. 230 V shunt motor takes an armature current of 6A from 230 V mains at no load runs at 1200 r.p.m. The armature resistance is 0.25 Ω. Determine speed and electromagnetic torque when the armature takes 36 amps. with the same flux. (10)

Reference Answer

### (a) Types of DC Motors
Direct Current (DC) motors are classified based on the method of connecting the field winding with the armature winding. The main types are:
**1. DC Shunt Motor:**
* **Connection:** The field winding is connected in parallel (shunt) with the armature winding.

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