Electrical Machines What is the necessity of copper brushes in a dc motors? None of these. To convert alternating supply current to direct current. To absorb the mechanical shocks produced during running condition. To increase the flux cutting by the rotor. None of these. To convert alternating supply current to direct current. To absorb the mechanical shocks produced during running condition. To increase the flux cutting by the rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Type of single phase motor having highest power factor at full load is split phase. shaded pole type. capacitor run. capacitor start. split phase. shaded pole type. capacitor run. capacitor start. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following, voltage regulation may be zero or negative leading power factor unity power factor All of these lagging power factor leading power factor unity power factor All of these lagging power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the emf generated by a 4 pole Lap connected DC Motor rotating at 1500 rpm having 1000 conductors and useful flux per pole is 0.4 mWb. 20 volts. 40 volts. 30 volts. 10 volts. 20 volts. 40 volts. 30 volts. 10 volts. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Shunt field of DC generators consists of--------number of turns and ---------- conductors respectively less and thick large and thick large and thin less and thin less and thick large and thick large and thin less and thin ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power developed by a synchronous motor depends on supply voltage and excitation excitation and load angle supply voltage, load angle and excitation supply voltage and load angle supply voltage and excitation excitation and load angle supply voltage, load angle and excitation supply voltage and load angle ANSWER DOWNLOAD EXAMIANS APP
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