Electrical Machines A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms. 0.573. 0.649. 0.443. 0.512. 0.573. 0.649. 0.443. 0.512. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The 3 - Φ induction motor with rotor circuit open will not run. run normally. get over heated. make noise. not run. run normally. get over heated. make noise. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines On switching a DC motor to DC supply mains, it is found to rotate in the direction opposite to that for which it is designed. The DC motor is Differentical compound. Cummulative compound. have an equal number of electrons and protons. Series shunt. Differentical compound. Cummulative compound. have an equal number of electrons and protons. Series shunt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to? 950 rpm 1000 rpm 975 rpm 940 rpm 950 rpm 1000 rpm 975 rpm 940 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slip of an induction motor during DC rheostatic braking is 1 - s. s. 2 + s. 2 - s. 1 - s. s. 2 + s. 2 - s. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an induction motor, air gap power is 10 Kw and mechanically developed power is 8 Kw. What are the rotor ohmic losses? 1.5KW 2KW 0.5Kw 3KW 1.5KW 2KW 0.5Kw 3KW ANSWER DOWNLOAD EXAMIANS APP
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