Electrical Machines The emf induced in the dc generator armature winding is AC and DC DC None of these AC AC and DC DC None of these AC ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a DC compound motor can be reversed by interchanging shunt field connections. armature or field connections. armature connections. series field connections. shunt field connections. armature or field connections. armature connections. series field connections. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motors, there is large decrease in maximum power factor when the dispersion coefficient is ________________. kept constant to certain value. decreased. increased. remains same. kept constant to certain value. decreased. increased. remains same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a seperately excited DC Motor if field current is increased, it will Increase acceleration duration. Increase speed Reduce armature heating. Reduce starting torque. Increase acceleration duration. Increase speed Reduce armature heating. Reduce starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature coil is short circuited by brushes when it lies in none of above positions. in any of above positions. along field axis. along neutral axis. in none of above positions. in any of above positions. along field axis. along neutral axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Motor is driving a constant load torque having armature resistance of 0.25 Ω and armature current of 60 A having connected to a voltage of 230 V. Now a resistance of 1 ohm is added into the armature circuit. The ratio of their speed will be 0.62. 1.24. 0.25. 0.72. 0.62. 1.24. 0.25. 0.72. ANSWER DOWNLOAD EXAMIANS APP
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