Electrical Machines The direction of rotation of a DC motor can be determent by Amperes law. Flemings left hand rule. Flemings right hand rule. Lenzs law. Amperes law. Flemings left hand rule. Flemings right hand rule. Lenzs law. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of IM the torque is inversely proportional to √slip. inversely proportional to slip. directly proportional to slip2. directly proportional to slip. inversely proportional to √slip. inversely proportional to slip. directly proportional to slip2. directly proportional to slip. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator if field winding attains the critical resistance the voltage generated will be zero. field winding will burn. machine will generate maximum power. machine will generate maximum voltage. the voltage generated will be zero. field winding will burn. machine will generate maximum power. machine will generate maximum voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 V dc series generator is driven at its rated speed. The no-load voltage across its armature terminals would be 6 V somewhat less than 230 V somewhat more than 230 V 230 V 6 V somewhat less than 230 V somewhat more than 230 V 230 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating windings is placed in which part of a D.C motor? None of these On yoke in the pole faces. On armature. On yoke in the inter pole gap. None of these On yoke in the pole faces. On armature. On yoke in the inter pole gap. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the necessity of copper brushes in a dc motors? To convert alternating supply current to direct current. None of these. To increase the flux cutting by the rotor. To absorb the mechanical shocks produced during running condition. To convert alternating supply current to direct current. None of these. To increase the flux cutting by the rotor. To absorb the mechanical shocks produced during running condition. ANSWER DOWNLOAD EXAMIANS APP
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