Electrical Machines The noise resulting from vibrations of lamination set by magnetic forces, is termed as magnetostriction. boo. zoom. hum. magnetostriction. boo. zoom. hum. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines As compared to an induction motor, the air gap in a DC motor is less than 50%. same. more. between 50% and 90%. less than 50%. same. more. between 50% and 90%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is All of these minimum maximum zero All of these minimum maximum zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The emf induced in a conductor rotating in a bipolar field is None of these DC. AC. both of above. None of these DC. AC. both of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is 2% 4% 25% 5% 2% 4% 25% 5% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case the conditions for maximum power for DC motor are established, the efficiency of the motor will be Around 90 % Any where between 75 % and 90 %. Less than 50 % Around 100 %. Around 90 % Any where between 75 % and 90 %. Less than 50 % Around 100 %. ANSWER DOWNLOAD EXAMIANS APP
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