(Solved): Q2. A 4 pole dc shunt motor takes 22.5A from a 250v supply, the armature and the shunt field resis ...

Q2. A 4 pole dc shunt motor takes 22.5A from a 250v supply, the armature and the shunt field resistance is 0.5 £2, 125 2 respectively. The armature is wave wound with 300 conductors. If the flux per pole is 0.02Wb. calculate a)speed Nik N.L. b) Torque developed T1/00/001/1 to c)gross power developed d) The efficiency if the friction and windage losses is 112W Q3. Write if the shown statements are TRUE or FALSE. 1- In DC machine the induced e.m.f is proportional with flux only. ?it 2- The Ta/l a graph of a d.c. series motor is a straight line throughout. 3- In a DC motor the direction of the shaft rotation can be change by/ changing the polarity of the power supply. 4-The critical resistance is less than armature resistance in shunt generator. 5-As the load is increased, the speed of a d.c. shunt motor increases slightly.