Electrical Machines Copper brushes in DC machine are used in both of above cases. where high voltage and low current. None of these where low voltage and high currents are involved. in both of above cases. where high voltage and low current. None of these where low voltage and high currents are involved. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For pure resistive load what is the armature reaction? cross magnetization magnetization All of these demagnetization cross magnetization magnetization All of these demagnetization ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines How can the synchronous speed of a 3 - Φ IM be varied? By varying the supply frequency. By varying supply voltage. By varying number of poles. Both (A) and (B). By varying the supply frequency. By varying supply voltage. By varying number of poles. Both (A) and (B). ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two single-phase alternators operating in parallel have induced EMFs on open circuit of 230∠0° and 230∠10° volts and respective reactance of j2 Ω j3 Ω calculate the terminal voltage 200 V. 223.V. 150 V. 300 V. 200 V. 223.V. 150 V. 300 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines 3rd harmonics are eliminated in induction motor by using V connection. zig - zag connection. star connection. delta connection. V connection. zig - zag connection. star connection. delta connection. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The field divertor resistance for a DC series motor is of order of 100 Ω 0.1 Ω 50 Ω 10 Ω 100 Ω 0.1 Ω 50 Ω 10 Ω ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS