Electrical Machines If B is flux density, l the length of the conductor and v the velocity of the conductor, then emf is given by Bl2v. Blv2. Blv. Bl2v2. Bl2v. Blv2. Blv. Bl2v2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will increase. remains same. Decrease.d none of these. increase. remains same. Decrease.d none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating winding is placed in the main field pole shoe All of these armature core main field pole shoe All of these armature core ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in DC machines can 1. provide half-wave rectification 2. Provide full-wave rectification 3. convert ac to dc 4. Convert dc to ac 5. provide controlled full-wave rectification From these, the correct answer is 2, 3, 4 2, 3, 4, 5 1, 2, 3 2, 3 ,5 2, 3, 4 2, 3, 4, 5 1, 2, 3 2, 3 ,5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine shape of main field flux distribution is? triangular peaky in nature flat tapped or trapezoidal saddle shape triangular peaky in nature flat tapped or trapezoidal saddle shape ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A large series motor is never started without some mechanical on it because otherwise it will Develop excessive speed and damage itself. Produce sparking at brushes. Open fuse or circuit breaker. Draw too much current. Develop excessive speed and damage itself. Produce sparking at brushes. Open fuse or circuit breaker. Draw too much current. ANSWER DOWNLOAD EXAMIANS APP
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