Electrical Machines The flux involved in the emf equation of a transformer has maximum value. total value. average value. rms value. maximum value. total value. average value. rms value. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Neglecting all losses, the developed torque (T) of DC separately excited motor, operating under constant terminal voltage is reduced to its output power (P) as T ∝ P. T ∝ √P. T2 ∝ P3. T is independent of P. T ∝ P. T ∝ √P. T2 ∝ P3. T is independent of P. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Torque developed in the rotor is inversely proportional to slip either of these not dependent on the slip directly proportional to slip inversely proportional to slip either of these not dependent on the slip directly proportional to slip ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field circuit of a DC shunt motor is opened The motor will attain dangerously high speed. The armature current will reduce. DC Shunt Motor The speed of motor will be reduced. The motor will attain dangerously high speed. The armature current will reduce. DC Shunt Motor The speed of motor will be reduced. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The no load and full load speed of DC motor are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor ? 14.28%. 16.67%. 15.30%. 18.25%. 14.28%. 16.67%. 15.30%. 18.25%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sparking at the the brushes, in a DC machines is due to presence of commutator. reactance voltage. high resistance of carbon brushes. armature reaction. presence of commutator. reactance voltage. high resistance of carbon brushes. armature reaction. ANSWER DOWNLOAD EXAMIANS APP
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