Electrical Machines In a three phase slip-ring induction motor, brushes are connected to 3 - Φ AC supply. equalizing coils. external star-connected resistors. DC supply. 3 - Φ AC supply. equalizing coils. external star-connected resistors. DC supply. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Alternator operates on the principle of electromagnetic induction. mutual induction. self or mutual induction. self induction. electromagnetic induction. mutual induction. self or mutual induction. self induction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The polarity of a DC generator can be reversed by reversing the field current. any of above. increasing field current. reversing field electric current as well as direction of rotation. reversing the field current. any of above. increasing field current. reversing field electric current as well as direction of rotation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which slots are used in the rotor of an induction motor? Open slots. Closed slots. None of above. Semi closed slots. Open slots. Closed slots. None of above. Semi closed slots. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a DC series motor is Proportional to the armature current. Proportional to field current. Inversely proportional to the armature current. Proportional to the square of the armature current. Proportional to the armature current. Proportional to field current. Inversely proportional to the armature current. Proportional to the square of the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in DC machines can 1. provide half-wave rectification 2. Provide full-wave rectification 3. convert ac to dc 4. Convert dc to ac 5. provide controlled full-wave rectification From these, the correct answer is 2, 3, 4, 5 2, 3 ,5 1, 2, 3 2, 3, 4 2, 3, 4, 5 2, 3 ,5 1, 2, 3 2, 3, 4 ANSWER DOWNLOAD EXAMIANS APP
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