Electrical Machines For a DC machine having P no of pole pairs, Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance for simple wave-winding ? PZL/4S PZL/4Sp² PZL/ 4Sa PZL/4Sa² PZL/4S PZL/4Sp² PZL/ 4Sa PZL/4Sa² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine, 1. physically, the brush axis is along the direct axis 2. physically, the brush axis is along the interpolar axis 3. schematically, the brush axis is along the direct axis 4. schematically, the brush axis is along the quadrature axis 5. armaturemmf is directed along the brush axis From these, the correct statements are 2, 4, 5 2, 3, 5 1 , 3, 5 1, 4,5 2, 4, 5 2, 3, 5 1 , 3, 5 1, 4,5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A flat compound generator is obtained from compound generator by connecting a variable resistor in series with the series field in parallel with the series field in parallel with the shunt field in series with the shunt field in series with the series field in parallel with the series field in parallel with the shunt field in series with the shunt field ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following DC motors will have percentage increase of input current for the same percentage increase in torque? Differntical compound. Shunt. Series. Cummulative compound. Differntical compound. Shunt. Series. Cummulative compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Speed of DC motor can be controlled by varying resistance of armature culture. all of these. applied voltage. its flux oer pole. resistance of armature culture. all of these. applied voltage. its flux oer pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as air gap. relative speed. cogging. crawling. air gap. relative speed. cogging. crawling. ANSWER DOWNLOAD EXAMIANS APP
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