Electrical Machines Flux density under trailing pole tips in case of generator will None of these decrease increase either increase or decrease None of these decrease increase either increase or decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking can be used for All of these series motors. compound motors. shunt motors. All of these series motors. compound motors. shunt motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC shunt motors are suitable for Centrifugal pumps All of this. Blowers and fans. Lathes. Centrifugal pumps All of this. Blowers and fans. Lathes. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the mechanical power developed by a DC series motor is maximum? Back emf is equal to zero. Back emf is equal to applied voltage. None of above. Back emf is equal to half the applied voltage. Back emf is equal to zero. Back emf is equal to applied voltage. None of above. Back emf is equal to half the applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the reason for stationary armature essential in alternators above 5 KVA? Insulation requirement is less. All of these Operating cost is less. Collecting of large current is simple. Insulation requirement is less. All of these Operating cost is less. Collecting of large current is simple. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines φA DC shunt machine generates 250 V on open circuit at 1000 RPM. Armature resistance is 0.5 Ω, field resistance 250 Ω. When running as a motor takes 4 A at 250 V. Calculate the speed when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%. 940 RPM 920 RPM 960 RPM 970 RPM 940 RPM 920 RPM 960 RPM 970 RPM ANSWER DOWNLOAD EXAMIANS APP
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