Electrical Machines If the field circuit of a DC shunt motor is opened The armature current will reduce. The speed of motor will be reduced. The motor will attain dangerously high speed. DC Shunt Motor The armature current will reduce. The speed of motor will be reduced. The motor will attain dangerously high speed. DC Shunt Motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The following statements relate to compensating winding (CW) and interpole winding (IW) of a dc machine : 1. CW neutralizes the armature reaction under a pole pitch 2. IW is connected in series with armature circuit 3. IW produces mmf in the commutating zone only 4. CWmmf is directed along the brush axis 5. Mmf produced by IW is equal to armature mmf From these, the correct statements are 1, 2, 3, 4 and 5 2, 3, 4, 5 2, 3, 4 1, 3, 4, 5 1, 2, 3, 4 and 5 2, 3, 4, 5 2, 3, 4 1, 3, 4, 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The principle of dynamically induced emf is utilized in thermocouple. generator. transformer. choke. thermocouple. generator. transformer. choke. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which 1 - Φ motor does operate at high power factor? Capacitor start. Split phase. Capacitor run. Shaded pole. Capacitor start. Split phase. Capacitor run. Shaded pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A motor operates in stable region at which of the following slip? high slip region both 1 and 2 low slip region unity slip high slip region both 1 and 2 low slip region unity slip ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an induction motor, air gap power is 10 Kw and mechanically developed power is 8 Kw. What are the rotor ohmic losses? 0.5Kw 2KW 1.5KW 3KW 0.5Kw 2KW 1.5KW 3KW ANSWER DOWNLOAD EXAMIANS APP
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