Electrical Machines When R2 is rotor resistance, X2 the rotor reactance at supply frequency and s the slip, then the condition for maximum torque under running condition will be R2 = s2X2. R2 = sX2. sR2 = X2. R2 = s2X2. R2 = s2X2. R2 = sX2. sR2 = X2. R2 = s2X2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For higher values of armature, the speed of a DC series motor is Inversely proportional to armature current. Proportional to armature current. Proportional to the square of armature current. Constant. Inversely proportional to armature current. Proportional to armature current. Proportional to the square of armature current. Constant. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Conservator tank is used to take up the expansion of oil due to temperature rise. for better cooling of transformer. None of these to act as an oil storage. to take up the expansion of oil due to temperature rise. for better cooling of transformer. None of these to act as an oil storage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous generator with constant steam input supplies power to an infinite bus at a lagging power factor. If the excitation is increased both power angle and power factor decrease power angle increase and power factor decrease power angle decrease and power factor increase both power angle and power factor increase both power angle and power factor decrease power angle increase and power factor decrease power angle decrease and power factor increase both power angle and power factor increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The voltmeter connected across a generator reads voltage same at no load and at full load (rated). The generator is of the type short - shunt generator. series generator. shunt generator. level compound. short - shunt generator. series generator. shunt generator. level compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator in DC generator is used for convert AC armature current in to DC reduce losses increase efficiency collecting of current convert AC armature current in to DC reduce losses increase efficiency collecting of current ANSWER DOWNLOAD EXAMIANS APP
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