Electrical Machines For a DC Shunt Motor having armature resistance of 0.5 Ω and 2A armature current at no-load, when the armature current is changed to 20A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load? 1037.5 r.p.m. 4575.4 r.p.m. 963.8 r.p.m. 1130 r.p.m. 1037.5 r.p.m. 4575.4 r.p.m. 963.8 r.p.m. 1130 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines How can the synchronous speed of a 3 - Φ IM be varied? Both (A) and (B). By varying the supply frequency. By varying supply voltage. By varying number of poles. Both (A) and (B). By varying the supply frequency. By varying supply voltage. By varying number of poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve high efficiency. quick acceleration. low starting torque. reduced size. high efficiency. quick acceleration. low starting torque. reduced size. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines _____________ types of induction motor are widely used. Squirrel cage IM. Three phase IM. Single phase IM. Slip ring IM. Squirrel cage IM. Three phase IM. Single phase IM. Slip ring IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Oil is provided in an oil filled transformer for insulating. both cooling and insulation. lubrication. cooling. insulating. both cooling and insulation. lubrication. cooling. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC Motor uses 4-point starter? DC compound motor. DC shunt motor with armature resistance. DC series motor. DC shunt motor with field weaking control. DC compound motor. DC shunt motor with armature resistance. DC series motor. DC shunt motor with field weaking control. ANSWER DOWNLOAD EXAMIANS APP
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