Electrical Machines In DC machine torque depends on which of the following? flux (φ) speed armature current (I) both A and B flux (φ) speed armature current (I) both A and B ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a step down transformer which one of the following statements is true? Number of secondary turns is less than primary turns. Secondary current is less than primary current. Secondary power is less than primary power. Number of secondary turns is more than that of primary. Number of secondary turns is less than primary turns. Secondary current is less than primary current. Secondary power is less than primary power. Number of secondary turns is more than that of primary. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutation in a DC machine may be explained as a process in which magnetic field is set up. by virtue of which emf is induced in the armature conductors. how alternate flux affects the main field flux. by which electric current in a coil is reversed. in which magnetic field is set up. by virtue of which emf is induced in the armature conductors. how alternate flux affects the main field flux. by which electric current in a coil is reversed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A large series motor is never started without some mechanical load on it because otherwise it will open fuse or circuit breaker. draw too much current. produce sparking at brushes. develop excessive speed and damage itself. open fuse or circuit breaker. draw too much current. produce sparking at brushes. develop excessive speed and damage itself. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Stability of a synchronous motor ---------- with the increase in excitation. decreases remains unaffected any of the above increases decreases remains unaffected any of the above increases ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in a DC machine makes an angle with the main pole axis which is load dependent. makes an angle of 90° with the main pole axis. is in direct opposition to the main poles. is in the same direction as the main poles. makes an angle with the main pole axis which is load dependent. makes an angle of 90° with the main pole axis. is in direct opposition to the main poles. is in the same direction as the main poles. ANSWER DOWNLOAD EXAMIANS APP
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