Electrical Machines With the increase in speed of DC motor Back emf increase but line current falls. Both back emf as well as line current fall. Back emf falls and line current increase. Both back emf as well as line current increase. Back emf increase but line current falls. Both back emf as well as line current fall. Back emf falls and line current increase. Both back emf as well as line current increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The ___________________ generator has the poorest voltage regulation. shunt. differential compounded. over compounded. under-compounded. shunt. differential compounded. over compounded. under-compounded. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V DC machine has an armature resistance 1 Ω. If the full load current is 20 A, the difference of induced voltage between generator and motor is 40 V. 0 V. 60 V. 20 V. 40 V. 0 V. 60 V. 20 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Motors for fans and pumps are selected in the rpm range 1440 to 2880. 375 to 500. 500 to 720. 720 to 920. 1440 to 2880. 375 to 500. 500 to 720. 720 to 920. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The damper windings also called the squirrel cage windings or damper grids are provided on the stator for improving power factor. both (A) and (B). consists of short-circuited copper bars embedded in the field pole faces. are provided in a synchronous motor to make it self starting. are provided on the stator for improving power factor. both (A) and (B). consists of short-circuited copper bars embedded in the field pole faces. are provided in a synchronous motor to make it self starting. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The noise resulting from vibrations of lamination set by magnetic forces, is termed as magnetostriction. zoom. hum. boo. magnetostriction. zoom. hum. boo. ANSWER DOWNLOAD EXAMIANS APP
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