Electrical Machines In dc machines, the armature windings are placed on the rotor because of the necessity for commutation development of torque generation of voltage electromechanical energy conversion commutation development of torque generation of voltage electromechanical energy conversion ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a DC motor can be determent by Amperes law. Flemings left hand rule. Lenzs law. Flemings right hand rule. Amperes law. Flemings left hand rule. Lenzs law. Flemings right hand rule. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An IM cannot run at synchronous speed because induction motor will become synchronous motor. rotor torque will not be produced. none of above. air friction will prevent it. induction motor will become synchronous motor. rotor torque will not be produced. none of above. air friction will prevent it. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an induction motor, the no-load slip is generally equal to 4 %. less than 1 %. zero. 1.5 %. 4 %. less than 1 %. zero. 1.5 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous generator is feeding a zero power factor (lagging) load at rated current. The armature reaction is ineffective. demagnetizing. cross – magnetizing. magnetizing. ineffective. demagnetizing. cross – magnetizing. magnetizing. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is 5.7 ohms. 2.2 ohms. 1.9 ohms. 6 ohms. 5.7 ohms. 2.2 ohms. 1.9 ohms. 6 ohms. ANSWER DOWNLOAD EXAMIANS APP
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